I need some help. My dog won't stop scratching. She doesn't have fleas and I just switched her food to Wellness whitefish and sweet potato dry food. I think she is allergic to cats. My BF and I moved into a house that has 2 cats. We have been living there for a while now. Someone told me to give her children's benedryl. She is only 4 pounds does anyone have any suggestions on what I can do, or how much benedryl I should give her? Unfortunately I can't afford to go to a vet right now. I am going to take her as soon as I can, but is there anything I can do on my own in the meantime?