Caddo I raise mine from pups usally alway raise them with cur pups I never let one fight or growl over a food bowl.nor at my kids but your dog being a older dog might just be protecting your home just let him know you don't approve of him being mean. I also agree with jeff don't let any dog fight over a hog not just a pit!
He has no dog aggressions at all.. He only growls at people he dont know..