You may be able to get to the retainers if you can get it up on some portable ramps. Might have to remove the plastic wheel well liner. There is a good amount ot slidey room in those bumper to fender connections, loosen, push, pull, noodle it around and tighten when lined up. Not much to it, you shouldn't have to pull it off the car at all.
130 total pounds of Pitbull ruled by 8 pounds of cat.