Hello. Our cat is a 14-year-old neutered male tabby with a life-long diet of Science Diet. Last summer he had fleas. within a few months, he developed a lesion below his anus. Believed to be related to self-trauma, he wore a collar. Within a few months after that, he began to stink to high heaven. The vet thought it was his breath, however, it was actually an infected toe. Once we obtained an accurate diagnosis, we were offered antibiotics. They did not resolve the infection or the lesion. The skin of the nail bed is swollen, bloody and emits puss. We soak it several times per week. The lesion below his anus is a red lump covered by blackish plaque. Our kitty wears a collar all the time now (consistent wear for 1 + month at this point). When we removed it, he licked both areas to bloody. Our vet has quoted us $2000 for a biopsy to ascertain the nature of the lesion, which we can't afford. $500 worth of blood lab work reveals no abnormality. Urinalysis shows crystals. The vet took a guess that the lesions may be eosinophillic granuloma complex and treated the kitty with oral prednisolone, tapering dose. Unfortunately, the lesions persist. Any advise would be greatly appreciated. We love this kitty and don't want to see him in pain. Thank you!
Having him wear a collar non stop was a bad idea. Whatever the problem was back there was likely exacerbated by the fact your kitty wasn't able to clean himself properly.
First, I'd suggest finding a different vet, just in case.
Hopefully they can give you an alternate antibiotic that will be effective, as well as a round of steroidal/cortisone shots to help with the inflammation/ swelling.
I'd also consider switching your cat's diet to one of the single protein food sources just in case diet is an issue. You can also try a product called "yucca". It's a natural, herbal anti inflammatory with some natural antibiotic properties that could help.
Be sure to also feed your cat 3 ounces of wet food twice daily to ensure proper hydration. Cats get most of their hydration from their food. Crystals means your cat is possibly low level dehydrated. Check out the proper diet faq in the health pages for more detail on this.
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