I inherited a healthy, except for a slight heart murmur, 10 year old chihuahua. She is current on shots and had no reaction to them. She ate small breed pedigree at first, but now feed Lotus good grain chicken kibble and pet plate topper (left over from a dog that died). I noticed she scratched her back alot, but didn’t see fleas, hair loss, a rash, and she mostly scratches after coming in from walks or arriving anyplace other than home. For a month, I left her home with my 7 year old chihuahua. They had the run of the house. One day I noticed pieces of my carpet in the hall. Now a whole corner of the rug is gone. I crated her. She screamed and whined and eventually escaped. I secured the crate with a carabiner. I came home to a crime scene. The bridge of her nose was bloodied and one of her nails was pulled out. I am taking her to work with me at a doggy daycare and boarding facility. Her nose has hair missing. I want to treat it, but with what and when will the hair grow back? Money is an issue because my hours are severely deceased now