#boldpatch

Hello there I was wondering if anyone can help I have a furry one today I noticed on his belly/chest a Chunk of fur missing and looks flakey could anyone tell me what it might be

Hello, My guinea pig, Rikky, has a bold patch on his back. I have read online that it might be mites and to treat it ivermectim. I bought some from pets at home. The first treatment was three weeks ago, and it said on the box to re do it after 4 weeks. However his bold patch has not improved...