>>9 (OP)
>pour the mushroom soup over the whole thing
>bake for 2 hours
<meat thermometer shows 150 degrees
Sounds like you're braising the rabbit given the liquid and long cooking time. In which case, checking for temperature is not the way to check if your meat is done. Braising means you are cooking the meat in liquid to retain moisture that would otherwise be lost in an already tough cut of meat. However, given the liquid, the meat is held at a specific temperature (maybe 150 to 180 degrees Fahrenheit) for a long period of time. So checking for temperature is not the way to go. Instead, you want to check if your meat has tenderized by sticking in a fork and seeing if it pulls off the bone easily. Think of braising like the bain-marie process. Your cue to take the custard out of the oven is that it has set, not necessarily that it has reached a particular temperature.
Otherwise, I don't have rabbit often, but this sounds like a recipe to try out.