I know guinea pigs are notorious for hiding illness signs and symptoms until it’s almost too late like the gremlins they are, so I'm hastily trying to find answers for my poor piggie Altair since I just noticed a larger balding patch on her side/belly area. I’m a high school student with a part time job so it’s going to be almost impossible for me to bring her to a vet so I was wondering if you guys had any advice on what the hair loss is caused by and what I can do to treat it properly, much thanks! And I tried to give all the information that I’ve seen often missing from people with similar questions that seems to help diagnose.
Cage Set Up: She’s four years old and kept with two other piggies in an outdoor large cage, which is kept covered at night and hygienic with regular cleans within the proper temperatures for guinea pigs who are kept outdoors. I won’t be isolating Altair since I know it’ll cause her more stress
Her Health: The last time I know for CERTAIN she did not have this bald spot (which was quite well covered by longer fur that went over it) was 12/25/22 because it was the last time I checked her out to make sure she was all dandy so beyond that I don’t know when this developed. I was gone on vacation for a few days a bit ago and my sitter accidentally overfed them veggies (time to educate said sitter) . Altair developed mild bloat from this that went down the next day with some help, I don’t know if this could be contributing to the bald spot.
Her Behavior Currently: There’s no fighting/quarreling between my three female piggies, she has been eating, drinking, exercising, and socializing regularly and healthily. She is not itching, biting, or seems to be irritated by the area and there is no irritability upon touch with the spot.
The Bald Spot in Question: One large bald spot on her side/belly with clear edges and hair loss nowhere else. Her fur is not coming out excessively in clumps- actually not really at all, just normal winter shedding like usual. The skin is the same color as her normal skin (no discoloring) but a tad flakey (like it might be starting to?) with one or two little red spots
Pictures: I tried pretty hard to get good pictures but it was an odd angle to hold her at and pull back the fur so apologies, and please as if you need better ones- bald spot is a little bigger than seen

Cage Set Up: She’s four years old and kept with two other piggies in an outdoor large cage, which is kept covered at night and hygienic with regular cleans within the proper temperatures for guinea pigs who are kept outdoors. I won’t be isolating Altair since I know it’ll cause her more stress
Her Health: The last time I know for CERTAIN she did not have this bald spot (which was quite well covered by longer fur that went over it) was 12/25/22 because it was the last time I checked her out to make sure she was all dandy so beyond that I don’t know when this developed. I was gone on vacation for a few days a bit ago and my sitter accidentally overfed them veggies (time to educate said sitter) . Altair developed mild bloat from this that went down the next day with some help, I don’t know if this could be contributing to the bald spot.
Her Behavior Currently: There’s no fighting/quarreling between my three female piggies, she has been eating, drinking, exercising, and socializing regularly and healthily. She is not itching, biting, or seems to be irritated by the area and there is no irritability upon touch with the spot.
The Bald Spot in Question: One large bald spot on her side/belly with clear edges and hair loss nowhere else. Her fur is not coming out excessively in clumps- actually not really at all, just normal winter shedding like usual. The skin is the same color as her normal skin (no discoloring) but a tad flakey (like it might be starting to?) with one or two little red spots
Pictures: I tried pretty hard to get good pictures but it was an odd angle to hold her at and pull back the fur so apologies, and please as if you need better ones- bald spot is a little bigger than seen


