I had a pitbull kill my pygmy goats by biting them on the back of the neck. They crushed them and tried to pull them thru the fence. It was aweful and I hate those dogs and really scare me. If one grabs on to you it won't let go. Tell your friend to put the dog where there's no people or don't go there. If you think I'm kidding, talk to a vet about how pit bulls bite and kill things. It's scary if an owner looses control over the dog. It happens.