I posted earlier that my 13 yr.old long haired toy chihuahua was losing her fur excessively prior to her spay. She had been a puppy mill breeder & came to us at 13 yrs.old. We were told she was spayed because of the csection scar felt by our vet...which was mistaken for a spay scar. She had a false pregnancy & then her fur started to fall out. After her spay, it was found she had cysts on her ovaries which can cause hair loss. She is on supplements to restore her fur to its luxurious state.