I had a couple of tenants that have a pitbull mix. The dog has some serious separation anxiety, to the point that it would destroy just about any enclosure it was put in, from a camper to a steel kennel to trim and doors in a house. Because of this, the owners went online and got a certificate stating that it was an "emotional support dog" so that they could take this dog with them on an airline instead of kenneling it like any normal, responsible pet owner. When they moved to a new house, I know for a fact that they leveraged this "status" against their current landlord for the purpose of getting out of paying a pet deposit. If that all weren't bad enough of an abuse of an otherwise necessary system, this dog attacked the face of, without provocation, a docile 8 year girl, and came within 1/2" of taking out her eyeball with a canine tooth. I love dogs, and I never had anything against pitbulls...but now I get it, although I still think this situation is due to irresponsible owners.