I also know how you feel. Our poor furbaby was doing the same thing. He was chewing himself raw and had all the hair chewed off and he was crying and whining, and we didn't know what to do. We thought that we were going to have to have him put down and that is when we decided to call our vet and tell him what was going on. We said that we could not afford the more expensive treatments and we didn't have to take him in to the vet. Just told him what our furbaby was doing and they prescribed the other pill, plus a small bottle of spray to spray on the spots. Your furbaby looks like our furbaby. Ours is black, is yours chihuahua also.