i have been around and trained both, some pits mite not work in a pack some can, it is [bANNED TEXT] you put in to your dog from the very start, as for a gaurd or a PP dog give me a pit bull from the right stock, i have trained both for this and the pit bull shits all over the them,
lets face it, no bull terrier is going to be as good a pp dog (consistently) as a purpose bred one - malinois, german shep, etc etc. not to say they can do it well, where i worked in sydney i trained loads of pits for pp and manstopper work and they can be ok or even good occasionally. but not like a purpose