My eldest female rat (~1.6yo) has been loosing hair in one single patch on her head over the past few weeks. She had a Myco infection about 2 months ago and was cured with Baytril and Doxy (but is still on low dose Baytril). She lives with 2 other young rats that are in good health. I do not see any signs of scabbing/ parasites or any other symptoms. She is not losing hair from any other area on her body which is why i'm very confused about what this could be. She does not seem to be bothered by it and is not over-grooming the area so I think it must either be on of her sisters or some disease. Has anyone else had this happen before and should I be worried?