Is a buffalo good for a pet?

Not unless you are extremely good at handling large unpredictable animals. I have dealt with buffalo (bison is the proper scientific name) and while at times they are in fact very gentle they also are prone to aggressive behavior. They are much like toddlers in a 800 lb to 2000+ lb body and as such even the slightest tantrum can cause significant damage to person and property. Having said that, I'd have to conclude that no a buffalo is not good for a pet, but never the less there are those who have ventured to do it and trained their "pets" even to the point of one I know of being house broken.