i have over 13 cats , but recently most of the cats that reached 7 months old started to be sick one by one they started to have runny nose and eyes and bad mouth smell with general weakness and frequently drinking water i gave each and no eating , i gave each one a half capsule of zithromax but no result untill many of them have died what is the nature of this sickness many thanks for info.
Your cats should be tested at your local vet for Feline Leukemia and Feline Aids. These are both viruses and will not respond to antibiotics. This is a good place to start. vetcare