A boy up by me has 1 (not sure if he still does, ain't seen him in a while) it's a pet, his wife has a tea cup yorkie, he got the Wheaton as a pup, yorkie was about 3, took it to dog lessons, tried to socialise it, always had it out when it was a pup around dogs and humans, was fine with dogs, had it if the lead on a walkway and it nailed a staff, couple of days later it nailed the yorkie, and it's tried to nail everything since!
Not saying they can't be part of a pack, just be really careful they are very very very unpredictable, thing is they look like big soft fcukers, far from it! He