My guinea pig (Juicy) began loosing hair in clumps about 8 months ago and scratching herself alot. She had baldness at her bottom. Immediately I was concerned and took her to the vet; the vet looked her over and told me that she was fine and that it was "normal" and he did not see anything wrong with her (no mites). He told me to look into getting her a female friend and maybe her baldness would go away and to bathe her twice a week with Dial antibacterial soap and let it sit on her for a few minutes before rinseing her off. The baths didn't seem to bother her but they didn't help her either. So about 2 months ago I went to a rescue and brought home a baby female guinea pig. I did the quarentine stage and made sure that she was 100% healthy before intoducing them. Everything has gone fine. Except now my guinea pig (Juicy)'s baldness that started at her bottom has now covered most of her back and sides and she has developed a scab that she scratches at constantly. And today I noticed that my other guinea pig (Beanie) has the same baldness starting at her bottom. PLEASE help me, I feel at such a loss right now. Does this sound like mites? What medicine should I ask for? Was the vet that I went to completely wrong??