My Dog Keeps Biting and Scratching Herself, Recently Causing a Sore, Bald Patch on her Back. Any Suggestions?
She's about 5 years old, the runt of a litter of purebred Jack Russell terriers. She's never had many health problems before. A week or so ago, she started itching herself really frequently. I have her a bath yesterday, and haven't seen a single flea on her. Just today, she started biting herself on the back. I just noticed a large, sore bald spot on her back, close to her tail. It hurts if I touch it, but she keeps trying to bite. The vet won't open for another two days, and i don't know how to keep her from biting herself. Any help?