I have a pitbull who is around 2, she has these small bumps under her fur. We have given her 2 doses of antibiotics by our vet they go away and then after a couple days after the antibiotic is gone they come right back. We have been feeding her chicken and rice for the past couple days thinking she was allergic to her dog food, they are still there and seems to not be getting any better. My vet has said they don’t know what is or what it could be. Any suggestions?