Quick answer: Dogs and cats need amino acids because proteins are built from amino acids, but a pet eating a complete and balanced diet for the correct life stage should already receive the required nutrients in appropriate amounts. An amino-acid supplement should be evaluated as an addition to the diet, not as a substitute for complete nutrition.
What are amino acids?
Amino acids are the building blocks used to make proteins. Different amino acids support normal tissue maintenance, enzymes, hormones and other biological functions. Dogs and cats do not have identical nutritional requirements, so species-specific nutrition matters.
Why complete and balanced food comes first
AAFCO and FDA explain that “complete and balanced” pet food is formulated to provide required nutrients in appropriate amounts and ratios for a stated life stage. Healthy pets eating an appropriate complete diet generally do not need routine vitamin or mineral supplementation simply because more nutrients sound better.
Can extra amino acids be useful?
They may be appropriate in a specifically formulated diet or when a veterinarian identifies a nutritional need. The important question is what the pet already receives from food and what the additional product actually adds.
What to check on an amino-acid supplement label
- Is it intended for dogs, cats, or both?
- Which amino acids are actually listed?
- Are amounts disclosed per chew or serving?
- Does the product also contain vitamins or minerals?
- Could those nutrients duplicate another supplement?
- Are serving directions and cautions clear?
- Is the product supplemental rather than complete food?
More is not always better
Some nutrients have safe upper limits, and adding multiple multivitamin products can create unnecessary overlap. AAFCO specifically cautions that supplementation of an already complete and balanced diet can push some nutrients above desirable levels.
Related PetVibess guides
- Amino Acid Chews vs. Multivitamin Chews
- Can Dogs and Cats Take Human Multivitamins?
- Daily Multivitamin Chews for Dogs and Cats
- PetVibess Amino Acid Multivitamin Chews
Sources
Written by the PetVibess Editorial Team. General educational and shopping information only; not veterinary diagnosis or individualized nutrition advice. Updated October 3, 2026.