My Devon Rex kittens came to me from a not so great breeder with chronic eye infections and colds. After multiple rounds of antibiotics and an FIP misdiagnoses. I took them to a vet specializing in cats and found out that thankfully it wasn't FIP but feline herpes. Vet prescribed this along with 3 months of interferon. My Kittens are now healthy and happy 11 month olds. They are still on the Enisyl-F but sneezing is way down and the eye infections thankfully have become a thing of the past. And the kittens love getting this.