The reason I’m reaching out is because of my own dog, Bruce hes a Pit Bull x American Bulldog mix with some Mastiff, hound, and maybe Boxer in there too. He’s around 3 years old and he’s not your average aggression case. I’ve put a ton into him structure, obedience, corrections, counter conditioning, alternative behaviours, drive outlets and he’s made huge improvements. I don’t know much of his history because he was once homeless in Arizona but I am assuming he was bred for dog fighting I have met with a few other trainers they all say I have done great things with the dog but it’s not just his genetics and to keep doing what I have been doing but not to expect anymore change from him. The story about Bruce is I was fostering him in Arizona when I was staying with my Grandma, he was a very shut down dog who was skin and bone, my Dad came to pick him up because the breed isn’t allowed on the air plane my sister then came to visit before my arrival home and he being super affectionate and loving with her but then once I got back she became his main trigger and still is (she lives in BC so I can do much training with her present), he is quite neutral from my training and can be around people in settings such as bass pro, Canadian tire etc and be completely neutral but he can go from completely neutral to full out aggressive with no warning. He is definitely harder than the average aggressive or reactive dog because it’s not dealing with fear, poor handling, or lack of socialization (not saying he had proper training through his fear stages but that is typically changeable) when Bruce is good he’s good but I need to treat him carefully most trainers even the ones who’ve been doing this a long time would admit a dog like him creates some subconscious stress just because of how quickly things can turn if you make the wrong move Food drives him but he’ll quit if it’s withheld too long. Toys are hit or miss he’ll go hard for 10 minutes in drive but isn’t naturally obsessed, I typically reward through premack nd if you deny him the win he shuts down fast praise and attention have been his best dopamine release I learned how to manage him well but I also feel like I’ve taken him as far as I can by myself.