Mites are mostly species specific, the mites that feed on rodents do not feed on snakes. Having said that though, it IS possible to bring home snake mites from the pet store that are on your feeders, but it's just as likely that the mites are hitching a ride on the box or the paper bag that you are carrying the feeders home in. In fact since snake mites like to cram themselves into tight little spaces, the folds of the paper bag are probably more likely.