best way as a young pup im talking about 8 weeks or so when you first get it have them feeding,drinking out the same bowl thats his how i was told as a wee nipper but the older the dog the harder it is especially if its already seen abit or been sort of trained ie with a rabbit skin dummie or what not. if it is a wee bit older than i would be keeping it on a lead as it could turn out not as planned and you will be a ferret down and possibly feck the whole dog/ferret bonding process up entirely hope this helps