“Pit bulls aren’t evil dogs. They’re trained to be evil dogs.”
Read up on the history of the breed. They were originally bred to be hunter killers. They don’t need to be trained to be vicious. It’s in their genes.
My mom once had three pit bull dogs that she raised from pups. She’s a loving granny, and treated those dogs like they were her own babies, but they would rip the flesh off anyone else had the misfortune to get close to them.
It’s simply the temperament of the breed.
Sounds like maybe your Mom shouldn’t have had those dogs.
If an owner can not Contain nor Train their dog properly then it’s best not have it.
Our right to own a dog must never infringe upon another person’s rights.