a patch of no hair

Question
dear andy

i have a 3 year old guinea pig, and she has been sheding alot and scrathes alot, and i have noticed that my guinea pig has been pulling hair off her body, which has now became a patch of no hair im very worried what should i do?
what could this be
i have heard of depressed guinea pigs, that live alone that pull out there hair but i have bought another guineapig to compamy her, but she seems to fight with the other one witch i gave away.

thanks
from siaumy

Answer
Hi Siaumy

It may be that your pig is depressed. Does she eat and drink normal, or does she look depressed, huddled in a corner?

It may be though that she has a skin condition which is irritating her. Please tell me if she has red or sore patches where she has pulled the hair out.

Thanks

andy