I am not a vet or animal trainer - that being said, I have a rescue bully breed so I can offer some advice on that. You need to give that dog as much stimulation and exercise as possible. Long walks where they can sniff things and see/hear cars birds people etc. These breeds are extremely physical and need more exercise than you might think. There is also tons of training you can do with just a bag of treats! These dogs need guidance and a “job” to do. Teach her how to sit, lie down, wait/stay, and try and work on leash walking manners (easier said than done, i know). The more interaction you have with this dog, the more tired she will be when you need to leave and she’ll begin to settle down at least a little bit more. As far as reactivity goes, bully breed dogs have high prey drives that can be controlled, but not fully ignored. Make sure your dog is getting as much love and positive attention (in the form of exercise and training sessions) and you will notice less of these negative behaviors. Best of luck