Are you trying to find pet amino acids for dogs among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!
We investigated and evaluated a number of the top-selling pet amino acids for dogs on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 26 hours of research and did 26 pet amino acids for dogs tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!
An overview of our top picks
Table of contents
The best pet amino acids for dogs you can buy today
- VET FORMULATED - Daily Multi for dogs is a veterinarian formulated supplement for use in dogs of all ages. It includes 28 nutrients to help keep dogs of all ages in peak condition.
- COMPLETE MULTIVITAMIN - Daily Multi fills the nutritional voids in commercial pet foods due to nutrient decay during processing. Our multivitamin supports a healthy coat, digestive health, Organ function and much more.
- DELICIOUS FLAVOR - Daily Multi chews have a delicious vegetable flavor makes them easy to give and will have your pet literally begging for more.
- CORN AND WHEAT FREE - Daily Multi is free of corn, artificial ingredients and wheat that may cause digestive upset.
- MADE IN THE USA - All Pet Naturals products are manufactured in the USA and distributed from our offices in the Green Mountains of Vermont.
- GENTLE AND EFFIECTIVE CLEANSING – Provide your dogs and cats with the utmost gentle care they deserve. Our pH-balanced and hypoallergenic formula, infused with amino acids, ensures a luxuriously soft touch while preserving their natural oils.
- DERMATOLOGIST-CERTIFIED – Suitable for all skin types, including sensitive skin. Our formula is free of SLS/SLES, parabens, alcohol, dyes, and harsh chemicals. We take pride in being cruelty-free certified, vegan, and plant-derived, offering a conscientious grooming experience.
- BENEFITS FROM AMINO ACID AND SCIENTIFICALLY-BACKED FORMULA – YUKIMI's premium blend harnesses the power of amino acids. It fortifies hair and roots, enhancing moisture retention in fur, while simultaneously improving skin and coat condition. Particularly soothing for pets with dry and itchy skin and frizzy coats, our formula goes beyond by deeply hydrating, leaving their fur and skin irresistibly silky and soft. Leading to a radiant, healthy fur shine and maintaining overall skin health.
- PREMIUM HUMAN-GRADE INGREDIENTS – YUKIMI's premium formula is crafted using natural and plant-based ingredients to deliver unparalleled benefits for your beloved pets. As devoted pet parents ourselves, we are deeply dedicated to providing only the finest for our fur baby. All ingredients are meticulously made and sourced from Japan, France, Germany, and the USA.
- YUKIMI CORE VALUES – YUKIMI is a luxury pet essentials brand headquartered in California, committed to providing top-notch skincare solutions for pets of all skin types. Our mission is to revolutionize pet care by offering a premium and elevated standard that prioritizes the health and happiness of our beloved pets. We strive to establish a brand that resonates deeply with pet parents worldwide.
- When to us Comfort Geriatric: for senior dogs (age 7> years) maintain optimal health by supporting their additional needs for healthy aging
- Incudes a balance of essential vitamins, minerals and amino acids that help minimize the effects of ageing and enhances their quality of life. Enhanced with 30% natural flavors for maximum palatability.
- Contains: 19 Vitamins & Minerals- building blocks considered to be essential nutrients for immune system function, healthy vision, teeth and bones, muscle control, hair and skin, and for your pet’s overall health and wellbeing. 18 Amino Acids- Amino Acids make up the building blocks of all protein. They are vital for the growth and maintenance of muscle, hair and nails, transporting nutrients and oxygen around the body, immune system function the production of hormones.
- Contains: MSM is a safe organic molecule essential for life and a rich source of needed sulfur. Sulfur remains a nutrient that both humans and pets don’t get enough of in their diets. MSM has been proven to: Promote healthy joints, improve mobility, relieve muscle sore - ness, reduce inflammation, enhance skin and coats and strengthen the immune system. Superoxide Dismutase from Bovine Source: Superoxide dismutase (SOD) is one of the most important and effective antioxidants in the body.
- GrassSaver Soft Chews For Dogs contain healthy ingredients that help to diminish yellow spots on your lawn caused by your dog’s urine.
- Helps to neutralizes the elements in your dog's urine that causes your nice green lawn to turn yellow.
- Unique formula contains a synergistic blend of B-Complex vitamins and amino acids. Also contains Yucca to help reduce stool odors.
- Tasty soft chews that taste like a treat, packaged with a re-sealable jar to ensure freshness.
- NASC, cGMP Compliant, Manufactured in the USA
- PREMIUM BLEND - Nutra Complete is veterinarian-developed with 95% ranch-raised beef & organs. Each delicious bite contains hand-selected ingredients for nutrition that help support healthy digestion, a thick coat, healthy immune function, and overall health and happiness.*
- HIGH QUALITY BEEF - Premium, ranch-raised beef and organs make up 95% of Nutra Complete. Our beef is 100% freeze-dried, so your dog gets easily digestible protein from every bite.*
- SEEDS, FRUITS, AND VEGETABLES - Our unique blend of seeds, fruits, and vegetables provides your dog with health-supporting nutrients. This includes flaxseed, blueberry, carrot, sweet potato, spinach, and more.*
- HEALTH-SUPPORTING VITAMINS AND MINERALS - Our food contains a variety of ingredients, carefully selected to offer your dog high-quality nutrition to help support their daily well-being and happiness.*
- USE AS FOOD OR AS MIXER - If you’d like to boost your dog’s diet with freeze-dried nutrition but don’t want to replace their current food, you can use Nutra Complete as a mixer. To add, simply reduce the amount of your dog’s food and replace it with the desired amount of Nutra Complete to avoid overfeeding.
- All dogs are unique. Your dog’s results can and will vary.
- DOG PREGANCY VITAMINS – Support the health of your pregnant dog and her growing puppies with our advanced prenatal vitamins, packed with essential nutrients and specially formulated for optimal maternal and fetal health.
- BREAST FEEDING MOMS – Our dog supplement supports lactating mothers and their puppies by providing optimal levels of key components, including vitamins, minerals, and other vital nutrients, for increased milk production and improved overall health and vitality.
- NEWBORN DOGS AND CATS – Our multivitamin for cats and dogs is rich in antioxidants vital for a pet’s skin and coat, muscles, joints, and bones, and heart and brain health, these pet tabs vitamins for dogs and cats support kitties, puppies, and all sizes in between.
- IDEAL FOR SENIOR PETS – As dogs age, their nutritional requirements change. Our supplement is specially formulated to meet the unique needs of senior dogs and cats, providing optimal levels of essential vitamins, minerals, and other nutrients to support overall health, mobility, and vitality in their golden years.
- TASTY BACON FLAVOR CHEWS – These chewable dog and cat vitamins can be given as treats or sprinkled over the food, making it easier to administer than liquid or powder supplements. Our pet tabs vitamins are MADE in USA and VETERINARIAN FORMULATED.
- GENTLE AND EFFIECTIVE CLEANSING – Provide your dogs and cats with the utmost gentle care they deserve. Our pH-balanced and hypoallergenic formula, infused with amino acids, ensures a luxuriously soft touch while preserving their natural oils.
- DERMATOLOGIST-CERTIFIED – Suitable for all skin types, including sensitive skin. Our formula is free of SLS/SLES, parabens, alcohol, dyes, and harsh chemicals. We take pride in being cruelty-free certified, vegan, and plant-derived, offering a conscientious grooming experience.
- BENEFITS FROM AMINO ACIDS AND SCIENTIFICALLY-BACKED FORMULA – YUKIMI's premium blend harnesses the power of amino acids. It fortifies hair and roots, enhancing moisture retention in fur, while simultaneously improving skin and coat condition. Particularly soothing for pets with dry and itchy skin and frizzy coats, our formula goes beyond by deeply hydrating, leaving their fur and skin irresistibly silky and soft. Leading to a radiant, healthy fur shine and maintaining overall skin health.
- PREMIUM HUMAN-GRADE INGREDIENTS – YUKIMI's premium formula is crafted using natural and plant-based ingredients to deliver unparalleled benefits for your beloved pets. As devoted pet parents ourselves, we are deeply dedicated to providing only the finest for our fur baby. All ingredients are meticulously made and sourced from Japan, France, Germany, and the USA.
- YUKIMI CORE VALUES – YUKIMI is a luxury pet essentials brand headquartered in California, committed to providing top-notch skincare solutions for pets of all skin types. Our mission is to revolutionize pet care by offering a premium and elevated standard that prioritizes the health and happiness of our beloved pets. We strive to establish a brand that resonates deeply with pet parents worldwide.
- DELICIOUS FOOD TOPPER: Nutrient Dense Food Topper for Dogs with a Taste They Naturally Crave.
- LOADED WITH NUTRIENTS: Naturally Rich in Amino Acids, Nutrients, Trace Minerals, Glucosamine, and Chondroitin.
- JOINT AND GUT HEALTH: Easily Digestible Powder Supports Gut and Joint Health while Providing A Great Nutritional Boost to Your Dog's Diet.
- TWO SIMPLE INGREDIENTS: Premium Grade-A Naturally Shed Wild Elk Antler and Free-range Elk Bone. Our Antlers are Naturally Shed & Cruelty Free.
- QUALITY YOU CAN TRUST: It's Understandable to be Worried About Products From Other Countries. At Pet MD, Our Products Are Produced in The USA in Facilities With Strict Inspection & Quality Controls.
- BETTER QUALITY OF LIFE. Is your furry friend thriving? We’d be honored to help your pet live their happiest and healthiest life possible.
- DIGESTIVE HEALTH & IMMUNE SUPPORT. Prebiotics, probiotics, and digestive enzymes support normal digestion and help maintain gut flora balance. A healthy intestinal microbiome is vital for supporting your pet's normal immune function.
- ENERGY & VITALITY. A comprehensive blend of amino acids, and superfoods—including greens, vegetable powders, marine vegetables, and blue-green algae like chlorella and spirulina that help maintain healthy cellular energy to support your pet's excellent health and vitality.
- ANTIOXIDANT-RICH. Rich in antioxidants from whole-food sources that help protect cells from free-radical damage. Antioxidant support helps promote balanced cellular health and overall holistic wellness for your pet.
- VETERINARIAN-FORMULATED. MADE IN USA. MONEY-BACK GUARANTEE. TRUSTED CARE SINCE 2001. Expertly developed by our compassionate team of in-house holistic veterinarians to offer your pet essential health support, our vet-formulated supplements reflect over 20 years of leadership in pet wellness. Proudly produced in FDA-registered, GMP-certified facilities in the USA, each product is made with the highest-quality ingredients and undergoes rigorous testing for purity.
- POWERFUL VITAMINS - Canine Boost is made with a powerful blend of vitamins, minerals, antioxidants, enzymes, and probiotics to instantly enhance your dog’s food and help them live a happy, healthy life.
- WHOLE BODY HEALTH - Each serving helps to recharge energy levels, support healthy bones and muscles, improve breath and odors, and promote whole-body health.
- HAPPY, HEALTHY LIFE - Canine Boost is convenient and packed with vitamins, minerals, antioxidants, phytonutrients, amino acids, digestive enzymes, and probiotics that restores missing nutrients to your dog’s diet to help them live a happy, healthy life.
- PACKED WITH NUTRIENTS - Canine Boost contains 3 powerful probiotics, nutrient-rich organic beef bone broth powder and flax seed, vitality-boosting vegetables like carrot, pumpkin, spinach, and broccoli, and more!
- ALL NATURAL - ZERO additives, fillers or artificial ingredients, available in a convenient food-topping powder.
- Please note, this product contains a manufacture date as well as an expiration date. The product has a potency validation of 30 months.
- Superfood Goodness: Packed with powdered bone broth, turmeric, and blueberry extract, this superfood blend is designed to keep your dog feeling their best.
- Happy Joints & Bones: Collagen and turmeric work together to support joint health, keeping your dog agile and playful.
- Enhances Mobility: Collagen and amino acids work together to improve joint flexibility and reduce stiffness, helping your dog move more comfortably.
- Softens Kibble & Enhances Flavor: Hydrating with Bone Broth Plus makes it easier for senior dogs to chew while also enhancing the flavor, making meals more enjoyable and enticing.
- Promotes Faster Recovery: The combination of collagen and amino acids aids in quicker recovery from injuries and strenuous activities, keeping your dog active and resilient.
- Anti-Inflammatory Benefits: Turmeric's anti-inflammatory properties have been shown help reduce joint discomfort for dogs of all ages.
- Vet Formulated & Vet Reviewed: Our formula is crafted and reviewed by Board Certified Veterinary Nutritionists and Veterinarians for safety and effectiveness
- Made in the USA at a cGMP facility.
- LONG-LASTING lubrication engineered for convenience. Designed to be applied as little as twice a day.
- ADDED AMINO ACIDS, such as lysine, support ocular health. Each gel drop provides a sheer coating that protects and hydrates with every blink. Ocunovis does not require nearly as many applications as ordinary eye drops.
- Developed by Sentrx Animal Care, BioHAnce is a unique, crosslinked hyaluronic acid (HA) that has been specifically modified for the ocular surface.
- MADE IN USA. The patented technology enhances the natural activity of healing, lubrication, and hydration.
- Provides supplemental support for cats diagnosed with Dry Eye. May also be used for dry, irritated eyes.
- A Highly Palatable Liquid to be used as a supplement in cats where additional potassium is recommended
- Hypo-allergenic
- Delivers 2mEq of potassium gluconate with each 2 ml dosage
- Provides B-complex vitamins, aqueous liver fractions and essential amino acids in a highly palatable format for additional support
- ✔️ 𝐀 𝐂𝐎𝐌𝐏𝐋𝐄𝐓𝐄 𝐀𝐍𝐃 𝐁𝐀𝐋𝐀𝐍𝐂𝐄𝐃 𝐁𝐋𝐄𝐍𝐃 𝐎𝐅 𝐕𝐈𝐓𝐀𝐌𝐈𝐍𝐒 𝐀𝐍𝐃 𝐀𝐌𝐈𝐍𝐎 𝐀𝐂𝐈𝐃𝐒 : To support the healthy development and disease resistance of puppies and adult dogs. Vitamin A helps to reduce the dryness, hardening and itching that may occur on the skin of our furry friend, helps to support the immune system and to protect against the harmful effects of chemicals.
- ✔️ 𝐕𝐈𝐓𝐀𝐌𝐈𝐍 𝐄 : Helps protect against many diseases and disorders such as cardiovascular, optic and neural disease which arise from old age and stress-causing diseases.
- ✔️ 𝐕𝐈𝐓𝐀𝐌𝐈𝐍 𝐁𝟗 𝐅𝐎𝐋𝐈𝐂 𝐀𝐂𝐈𝐃 : Is a vitamin especially needed by dogs during pregnancy. If used regularly in the pre-pregnancy period, it supports the healthy development of the offspring in the mother’s womb.
- ✔️ 𝐕𝐈𝐓𝐀𝐌𝐈𝐍 𝐁𝟓 : Pantothenic Acid is an anti-stress vitamin. Our furry friends can’t fight infections if they don’t get a sufficient amount of Vitamin B5.
- ✔️ 𝐕𝐈𝐓𝐀𝐌𝐈𝐍 𝐇 𝐁𝐈𝐎𝐓𝐈𝐍 : Is a very important vitamin which helps overcome one of the greatest challenges faced by animal lovers-shedding. Biotin helps your dog to keep that healthy, wondrous shining and non-shedding coat.
- DNA PET Happy Healthy Muscles Powder features grass-fed, grass-finished beef isolate protein, offering your dog a high-quality source of protein. Infused with GoBeef powder, it delivers a nutrient-rich profile designed to support muscle care for dogs of all ages. This formula is unflavored, making it easy to incorporate into your dog's diet.
- This beef protein supplement for dogs contains all 9 essential amino acids, the building blocks of proteins. These amino acids are carefully included to complement your dog’s diet and support muscle care and development.*
- With its high collagen content, this pet supplement is designed to complement joint care and mobility, making it a suitable addition for both active and aging dogs.* Collagen may also help support skin and coat care, making it a thoughtful choice for your pet's daily routine and carnivore diet.
- Committed to purity and safety, DNA PET Happy Healthy Muscles Powder features 100% grass-fed beef isolate protein in an unflavored formula. It’s non-GMO, dairy-free, and free from hormones, soy, grain, and gluten, providing a clean and wholesome supplement for your canine companion.
- Designed for dogs of all life stages, including large breed puppies, this muscle-supporting powder caters to the specific nutritional needs of every age and size. Manufactured in the USA with globally sourced ingredients, it reflects our commitment to quality and care for your pet.*
- PERFECT PROTEIN SUPERFOOD NUTRITION. Made with humanely sourced CAGE FREE WHOLE EGGS as the #1 ingredient. Packed with ANTIOXIDANT and PHYTONUTRIENT rich SUPERFOODS blueberries, kale, coconut, carrots, and cranberries.
- VETERINARIAN FORMULATED SquareEgg includes the HIGHEST QUALITY PROTEINS known to man. Cage free WHOLE EGGS and WHEY PROTEIN rank highest in protein BIOAVAILABILITY.
- This GENTLE TO DIGEST formula is perfect for SENSITIVE STOMACHS based on the exceptionally digestibility of both eggs and whey. High quality PREBIOTICS & DIETARY FIBER sources promote healthy digestion.
- ROTATIONAL FEEDING. Promoting a WELL ROUNDED diet by including varying protein sources is optimized with the COMPLETE AMINO ACID PROFILE of eggs and whey that help to promote a LEAN BODY CONDITION and STRONG MUSCLES.
- SENIOR DOGS benefit from the GENTLE KIBBLE STRUCTURE as well as from the BRANCHED CHAIN AMINO ACIDS found in whey protein to help promote MUSCLE RETENTION.
- VEGETARIAN FRIENDLY. Based on QUALITY, DIGESTIBILITY, and BIOAVAILABILITY the protein nutrition found naturally in eggs and whey are superior to other plant based protein sources used in other vegetarian pet foods.
- MADE IN THE USA. No ingredients from China. ALL NATURAL NUTRITION. No Chemical Preservatives, No Fillers, No Kidding.
- SUPPORT FOR A HEALTHIER HEART- Cardio MAX is a premium formulation designed to help strengthen and support cardiac muscles, promoting enhanced blood circulation and overall heart health. Contains Taurine, L Carnitine, CoQ10,Hawthorne Berry, and Vitamin E which promotes cardiovascular heart health and strength.
- BACKED BY SCIENCE: Vet formulated to ensure that pets with cardiac conditions or pre-existing sub-optimal cardio function are getting the necessary ingredients to support a long, healthy cardiovascular life
- RICH IN TAURINE-Taurine exhibits antioxidant properties, helping to neutralize harmful free radicals in the body. By reducing oxidative stress, taurine may protect the heart and blood vessels from damage caused by oxidative processes, thus supporting heart health.
- QUALITY PRODUCT WITH QUALITY INGREDIENTS-Cardio MAX is manufactured in the USA, following strict compliant practices. All products pass the highest quality standards and contain no additives, fillers, preservatives, or artificial colors.
- OUR PRODUCT CARRIES A 100 PERCENT PRODUCT GUARANTEE: Try our product without worry. You may return the product for a full refund if you are not satisfied for any reason.
- 10-in-1 After Bath Spray is a professionally formulated leave in conditioner spray with ten amazing benefits... Conditions, Softens, Revitalizes, Prevents Itch, Prevents Flake, Detangles, Shines, Luxurious Scent, Aromatherapy, and Cleans.
- Our Ethical Commitment: Proudly made in the USA. Our production processes are animal cruelty-free. We are committed to creating exceptional products that are safe for you and your pets! Naturally Simple Ingredients - Infused with aloe vera, silk amino acids, and green tea leaf extract for healthy skin & coat. Will not disrupt topical flea preventives.
- Works On All Types Of Coats - Puppy & cat safe. Detangles and loosens matts. Works on even the toughest to brush coats. Great refresher after using dog shampoo for smelly dogs. Also good to use after applying dog shampoo for dry itchy skin to provide some dog itching skin relief.
- Product Applications - This is the stuff to work as an alternative or companion product to your favorite dog spray deodorizer, dog conditioner, dog spray, dog dematting spray, or leave in conditioner.
- Easy To Apply - Simply spray as needed in affected area. Leave alone or brush in with dog brush. No need to rinse.
How to choose a good pet amino acids for dogs
Does the idea of finding a fantastic pet amino acids for dogs make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!
Your presence here indicates that you are interested in pet amino acids for dogs. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top pet amino acids for dogs products available right now. You might be wondering how we came up with the list. How was this buying guide developed?
First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top pet amino acids for dogs on the market right now!
The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:
Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top pet amino acids for dogs brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.
Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top pet amino acids for dogs based on those.
Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.
Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.
Customer ratings: Would it be accurate to suggest that the pet amino acids for dogs were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.
Customer Reviews: Like ratings, provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.
Seller Rank: This is very intriguing! Not only do you need a good pet amino acids for dogs, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.
Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your pet amino acids for dogs.
Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting pet amino acids for dogs for months and years to come.
Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.
Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.
These are the standards by which we selected our pet amino acids for dogs. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.
Why should you believe us?
There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what pet amino acids for dogs should you purchase in 2022?
This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on pet amino acids for dogs.
