Welcome Christie and Heelz!
Great advice so far... I would just like to add that as Heelz is probably on a confusing stage right now and just trying to get a handle on changes, it's not a good idea to change anything else (including his food) until he's settled. Did his previous owner leave you all his stuff and food? If you let us know how much he weighs, his activity level, any health observations, and what food, snacks, activities he's currently on, we can guide you from there.
Another thing to note is that because of their snub noses, it's a bit of a challenge for them to thermoregulate by panting. So we try to keep the bullys under 75 degrees and above 55 degrees (especially while traveling in the back of the van). Also they need close observation during walks so that they don't overheat. And speaking of walks, a lot of bullys have sensitive foot pads so they can't walk too far on concrete or asphalt.
I have 2 bullys, a 5 year old 65-pound female and a 2 year old 55-pound male. The 5 year old is super lazy and stays put 22 hours of the day while the 2 year old is a Tasmanian Devil that would catch frisbees all day long if somebody will throw it. They're both on a Prey-Model Raw diet (they eat raw meat with some raw bones and organs including their treats).
Hope to see pictures soon!