Posted by iHerb Customer on Sep 17, 2008 | Verified Purchase
I use L-Lysine Powder on all my cats and kittens (over ten weeks) food. I sprinkle it on top and they do eat it. I've noticed that a couple of cats with runny eyes (17 year old Persian neuter), don't have runny eyes anymore. I am glad I'm using it. It's delivered in a timely manner once I order it.