Hi there mate hows it going?? would highly reccomend getting them from when they are kits (babys) they get used to you and the more you handle them the better they are to handle!! in regards to training i tend to use a small earth that i know only had 4 or 5 holes and know where all the exits are! however it is in a ferrets insticts to hunt anyways! ive never vaccinated any of my ferrets and they have all been fine!! you can feed them a varied diet really! i tend to give them day old chicks, dry mix, rabbit, doves, pigeons etc do you know what type your looking for??