I regularly look after my friends guinea pigs whilst she’s on holiday but the day before she gave them to me Amber ( the piggy) has a very sore patch with red spots with hair missing ( looks like blood ) and I’m not entirely sure what it is ? I don’t think it was her buddy as she is still very small. I am currently using a oil made from the piggy potions book but I don’t think it’s doing much. Vet time ?