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My sick cat won't eat lysine for URI. Can I syringe it with water?

Updated on September 23, 2025

Pet's info: Cat | Domestic Shorthair | Male | neutered | 5 years and 3 months old | 13 lbs

My cat is showing signs of an URI. Right now he’s just sneezing, watery eyes, and is breathing out of his mouth. My vet can’t fit me in until next week so they told me to use lysine powder to clear up the symptoms. I tried to mix it in with wet food which he didn’t touch and he won’t eat dry food either. Am I able to mix it in with water and syringe it?

1 Answer

Most Helpful Answer

Dr. Melanie, BVSc MS

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on May 3, 2019

Leo may not be eating because he can't smell is food. When cats can't smell their food, they won't eat. Try gently warming really smelly wet food like sardine or fish based. If he eats that, then add the lysine to it. Also try bringing him into the bathroom when you take a shower or putting him in a room with a humidifier. The steam may help his congestion. If he really starts having trouble breathing, take him into a vet immediately. Best of luck.
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