bold patch

[Da_3_mad_pigs]

when I was holding my guinea pig cookie I saw that he had a bold patch on his body. do you think it is mites, one of the other piggies bit him or something else?
HELP!

 

[Piglet]

Where was this patch? If its behnd the ears then its normal. Hair loss can be a sign of mites

 

[Da_3_mad_pigs]

yeah, its behind his left ear.

 

[Piglet]

You've got nothing to worry about. All guinea pigs have bald patches behind EACH ear. Check his right ear too