Dog Skin Warts Does My Dog Have Skin Cancer Or Some Sort Of Infection?

Does my dog have skin cancer or some sort of infection? - dog skin warts

My dog (collie mix) a wart bizarre piece on the back near the tail. They bite hard and chew constantly. The constant chewing lose a piece of hair where the gum sores and warts visible, with a little skin to take in order to do inflammation.

It smells horrible and strong. We have our veterinary family and never had anything like it before. I wanted to do a biopsy, but we had the $ 150.
Do not think that this cancer, because it just over a year and apart from the constant scratching, his behavior has not changed everything.

He is 7 years, and he certainly has the Collie skin last summer, we have decided to shave, try to get air points. It seems that he feels better. In addition, our vet prescribed steroids and had a great affection, but there was expensive and we can not fill. His itch came back later.
You know what can be?

* Again:
"It was thethe veterinarian. Several times! We simply do not meet the money for a biopsy, but we must be able to your steroids next week.
"With the open and vet visits, we bathe once every two weeks with a dog a mild soap, oatmeal. It seems not much to do for his itching and the smell is almost immediately .*