Scrappy
Legendary Knight
I like to "think" that I have an affinity/ability with "problem" dogs?
But I also think this guy has gone too far?
IMHO, letting any large powerful dog know it can't do whatever it likes, whenever it likes. Is an absolute must.
It makes for a happy/balanced relationship for all concerned. In my experience, once the dog knows it's loved but it also knows it isn't in charge. It's happy with its place in the family pack.
Withholding food when it's placed right in front of the dog is a step too far. It's either feeding time, or it isn't.
IMHO, it's borderline cruelty & his dog is scared of him ☹
A dog that's scared of you. Is far less likely to protect you. Without a monetary thought for its own safety. I'd much rather have one that would take on my adversary because he/she thought they'd get a biscuit/fuss afterwards
I make my dog sit and wait for his food, but only whilst I fill his water bowl, and I can remove his food at any time without saying anything and without any kind of reaction whatsoever. This guy is teasing/frustrating the dog and possibly reinforcing food aggression IMO.