if your mate has got his own ferret box on the other side of a hedge and you got your own box on your side, make sure which one is putting the ferret in, or else you spend half hour watching a hedge with no ferret in it. Silly, but its happened. seriously, mange can occur which shows as pink, sore looking skin and hair loss. caught if the ferret has been workingg dirty places like ratholes or fox hole. get benzyl benzoate over the shelf at chemist. rub it on the ferret but only half the ferret each day, front half one day , back half next day. wash off with water what you put on first day