So I’ve just gotten another guinea pig, she was a rehome, is 6 years old and was well looked after by her previous owners. When I’ve been looking at her on my lap I noticed a patch of brown flecks in her hair at the back of her neck and know this could be hay mites/ static lice. Would you expect to see any other signs with these such as scratching etc? Basically wanting know how I know for sure it is them. P.s last time I took my other guinea pig to the vet for suspected hay mites the vet weren’t very sure and just dismissed it. I can add a photo in an hour or so when I am home.