A 2 year old AB is grown (meaning mentally mature)...you show it a hog, it better be excited about the project and want to engage, it may be unsure if it is OK to engage...but it should want to. And once you show the dog it's OK to engage (ie. letting another dog in there to catch with it) it should engage. We aren't talking about a pup or even a juvenile, we are talking about a grown bulldog, so the dog not being an APBT is irrelevant due to the age and maturity factor. It shouldn't take too much to get a dog like that started.
My Dallas bitch caught the first hog she saw....just about pulled my sons, who's 6'1" and 230 pounds, shoulder out of socket to get to it. She was a little over 2 years old when I got her, and she had been off the plane for 3 days when we showed her the hog.
Her first woods catch