I have not seen a live weasel since around 2013 and the dog was chasing it... Big surprise because I didn't think they were around.. Found ones the dog killed and less than a month ago one got hit on the road in front of the house.
Coons dug under my neighbor's deck and got into the wall of the addition.
I used to have pet ferrets but I've never seen a weasel in the wild either. I think if my dogs brought me one I'd be surprised too! Those coons are just too crafty for their own good (or ours)! They're probably the most likely thing to get through my fence into the yard while the dogs are in the house at night.