help skin hives

Hi any idea what can be causing this hives like rash? No foods have been changed his only 14weeks old and is on the same diet from the breeder. He did get the cat flu that his now recovered from then his broken out in these hive like rash the vet has giving him some antihistamine and...

Hello, I have had this on going problem with my poor little sphynx Lilith. She has extreme breakouts in hives. I was told she was allergic to plants so I don’t have any living plants at my house. Her diet has recently changed so it could be this but she has been eating the gastrointestinal...