Jazz used to get really growly/snarky when we moved her, esp in her sleep.
I guess it never occured to me to use treats …. I feel like that's more of a bribe in those situations.....I just told her to knock it off and picked her up in such a way that she could not bite me, and moved her. Now anyone can move her anywhere, any time and she may still "har-umph", but that's it.
We're doing the same thing with Keoki, and he's almost there. Still grumbles if my two youngest boys bug him in his sleep {to move him, etc. not just to bug him; that is NOT allowed} , so when that happens I have them {with my help} hold his neck firmly but gently in a way that does not allow biting, with a firm but calm "NO", then they pet him, talk to him {reward for stopping the noise}, and move him. He is very close, however, to not complaining at them at all.
I guess I use treats to reward new behaviors that I am training -- sit, stay, etc. But when it comes to them responding to people in an unacceptable way, I look at that differently. I don't use treats. Feels too much to me like -- "If you don't growl at me, I'll give you a treat" when what I am going for is "You do not growl at me {or any family member}, period". Besides, what if I forget the treat when I want them to move? Then what?
Growling at strangers is different, and it gets a "no", and I remove the dog. When we have people over that make them uncomfortable, I crate the dogs or let them outside when the people are in and vice versa.
Just my .02.