I have a 3 year old cat, perfectly healthy, but her nose is constantly stuffed and 2 or 3 times a week she has a huge sneezing fit and sneezes out a quantity of ... well, you know what. She is otherwise perfectly healthy, eyes clear, appetite great, good energy. She's been on antibiotics twice and they did absolutely nothing except make her annoyed with me. The vet wants to take x-rays to see what the problem could be. I think it might be allergies but then how do you treat something like this?