My Guinea pig has developed a crusty bit of fur on his back ... I'm not sure if it's fungal or just from the heat (currently we've got a heat wave in the UK). Never happened before and his behaviour is unchanged. Perhaps he's a bit grumpier than usual snapping at the other pigs but that could just be confirmation bias from me. I've attached pictures, can anyone help?
I don't think it's causing pain or discomfort but can't be sure.
I don't think it's causing pain or discomfort but can't be sure.
Best thing to do is to have it checked out by the vet. It’s hard to tell what it could be from your photos.