I have done all of the above. My point was the safety of Cytopint. Her spot which is probably another mast cell tumor grew 3 to 4 times its size and bled a lot. It has been stable for years until this shot. Mast cell tumors are not fun and the thought of losing her is too much to bear. I am furious with vet who wouldn't see her til Monday. Plus her appetite has slowed down a bit and she seems more tired than usual.its a fairly new drug and no matter what anyone tells you ALL drugs have some side effect. Because its so new I would never use it. Not saying that is what it is but I would not use it. Until you can get her to the vet I'd suggest putting bag balm on it, it will make it soft so it doesn't crust and scab over. You can get bag balm at a drug store or an animal feed store. We used it on cows for everything. You can give her benadryl for the itch and wash it with unscented baby wipes. Do her feet and belly as well with the baby wipes every time she comes in from outside. I suspect when you bring her back to the vet he will shave the area down to the skin and give you an anti biotic. If you do put her on an anti biotic be sure to give her a probiotic. The anti biotic will kill the good bacteria in her intestines and the probiotic will put it back. A dog's health and immune system pretty much originates in the gut so be sure to start her on a probiotic. Actually I give my dog a probiotic daily, whether she needs it or not. It can't hurt and does help
How is your dog doing today? I hope she's better today and tomorrow when you go see the vet you can get further help. Coming on this forum and sharing your bad experience can help others who are thinking about using that drug on their dog. I would contact the manufacturer and relay all that's happened...it could help. Please keep us posted.