Well unfortunately Monty STILL is fighting me with his harness
I spent 45 min yet again yesterday trying to get his harness on and my husband finally had to step in. I have done all of the positive reinforcement, he has gotten a ton of treats for every baby step he makes. He will put his muzzle through the harness to get the treat but immediately backs up knowing what is coming next. I am still trying but it is the most frustrating thing I have ever been through. I do feel if we (I) can master this that perhaps we can stop his aggression in other areas as well. He is teething right now but I don't really think it is related to the harness, he still allows us to put blankets on his head, massage his muzzle, touch his face and head without any signs of it bothering him at all. I haven't even attempted his sweater as this will surely spin him right into an angry frenzy
He does need to get used to this as he will be spending winters in Canada (as of next year) and it is too cold for him without his sweater. Right now I am fine with his winter coat which does not go over his head but the sweater is better when it is chilly but not really cold. UGGHHHH!!
Thanks everyone for sharing their experiences, I can use all the support I can get on this one.