Not saying its not mites but they sound like chiggers. Not sure how they would get on rodents, but it could be clover mites. If its clover mites then I doubt there is anything to worry about. Chiggers on the other hand may be something to take serious and get out your home
ASAP.
Yea they're outside since I ever noticed em .. we actually caught a few of them in a sterile urine cup lol but I got a magnifying glass out and really they look exactly like spider mites.. to me and my husband .. but what is chiggers and how or where do they come from?