i take my lakie x parson, saves time on netting up an empty warren, as he gives a mark. also useful for small warrens/undergrowth/sticking him inside a long net. as for mixing ferrets and dogs, i let the dog sniff them inside a hutch for a while, 2/3 days. then i put the dog on the lead while letting the ferrets run around, if the dog goes for them, sharply pull on lead, give a little smack and emphasise that his not allowed to do that. also although i didn't have to do this, a friend of mine lets ferrets/dogs drink milk out of same bowl.