Wow, what a great story!
I'm a new bully owner myself and it is really amazing once they open up and trust you. It's really great that you have taken her from being left alone outside (and almost shot!) to a loving home.
I'll second the benadryl suggestion. My vet also said you could use a zyrtec (instead of multiple benadryls per day). I haven't tried that yet, but it sure seems like you have a good handle on the allergies and other maladies and that they are improving. You may also consider filtered water (depending on the water in your area). It may also take a bit for the grain-free food to really kick in, but if her coat is already better, then that's great.
I've been giving her zyrtec (found a few threads on here talking about it) and it has been working wonders. She is still licking her paws some, but her eyes are no longer weepy all the time. She's still having issues with yeast and getting yeast blisters in between her toes.
so glad you guys have found each other and she is right where she belongs FAMILY thank you for adopting and sharing look forward to reading more of your posts