my female bunny is about a year old and lives with her brother (both neutered about 3 months ago) and i’ve recently noticed a few scabs/sores on her. the first was quite large, spreading from the bottom of her neck/top of her shoulder, down to the top of her leg, and seemed to appear quite quickly. she also had one at the same time on her chest, between her front legs. this one has now healed and gone away, however another has appeared on her chin. she also has a bald patch on her belly, but we can see no signs of mites on her. any ideas of how to help her?