Had a few bad experiences with them my self. Been on hot ground before , and the dog starts doin laps around a 50 acre field when it misses something, ignoring any comand. And only seen a handfull that wont kill a ferret,but there are very few around my area as they have little use. So cant judge all..
not having ago or anything mine plays with the ferrets it just early introduction as soon as i got him i started introducing him to them(3 months old)