The last time I had rats with mites (my first colony) it was recommended to use a frontline flea and tick spray. I took a Q-tip and dabbed it into the spray and then dabbed some onto the back of the rat. The mites were gone not long after and I never had mite problems after that with that colony. My friend is sanitizing the whole cage with bleach. I still have some of the frontline spray so would it be a good idea to treat everyone with it, just in case? She said the mites were red in color.

These rats are pets as well as breeders. She breeds rats to feed her snake.