Here is a story that may interest you, it is another example of the behaviour you describe (written by a former vet tech, mounted police officer, and pit bull apologist) :
http://www.animals24-7.org/2018/05/15/why-pit-bulls-will-break-your-heart/
Animal shelters nationwide are filled with Pit Bulls. Many abused. Some fed gun powder (to make them fight). Their meth-cooking, slop-bucket-headed owners use them to keep people from their stash. Doesn’t always work. The dogs sometimes eat the dope.
That’s a great story. Thanks for posting. One odd thing I did notice is that the dates look off. The date it was posted was May 15 2018 but most of the comments are from four years ago? It also cites the number of pit bull related deaths for 2018.