Fish Oil / Omega-3 for Pets
A pet-parent guide to omega-3 fatty acids, including benefits, what to look for, and how to give fish oil safely.
What it is
Fish oil is a concentrated source of omega-3 fatty acids, primarily EPA and DHA. These are essential fats that dogs and cats must get from their diet, since their bodies cannot produce them in meaningful amounts. Common sources include anchovies, sardines, mackerel, salmon, and krill.
How it can help
Omega-3s are best known for supporting skin and coat health. Many pets with dry, itchy skin develop softer fur and less scratching after consistent supplementation. EPA and DHA also help maintain joint comfort, heart health, kidney function, and brain development. Senior pets and growing puppies or kittens may especially benefit from DHA for cognitive and visual development.
What to look for
Check the label for the actual EPA and DHA content, not just the total fish oil amount. Higher concentration means more active benefit per serving. Wild-caught small fish are generally lower in contaminants. Look for products that mention third-party testing for heavy metals, PCBs, and oxidation. Fresh fish oil should smell mildly fishy, not overwhelmingly rancid.
Safety tips
Give fish oil with food to improve absorption and reduce the chance of fishy breath or stomach upset. Store liquid fish oil in a cool, dark place and use it before the expiration date. Avoid combining high-dose fish oil with blood-thinning medications unless your vet approves.
When to talk to your vet
Consult your veterinarian before giving fish oil if your pet is pregnant, nursing, has a bleeding disorder, pancreatitis, kidney disease, or takes medication. Your vet can recommend the right dose based on your pet’s weight and health status.
When in doubt, ask your vet
Every pet is different. This guide is for general education only. Always consult your veterinarian before starting a new supplement, especially if your pet has a health condition or takes medication.