I would not keep a tom that was raised as the lone turkey with chickens in with chickens. He was imprinted and cannot understand that they aren't turkeys. Only bad things can come from this.
Other than the calcium not being ideal for a tom, the protein, lysine and methionine look okay. I can't remember for sure but when I read their information a long time ago, it seemed like it was the salt ratio they may have been the culprit.
I feed my adult turkeys a 20% protein all flock...
Food effect on aggressive turkeys
You can try catching him. Pick him up and stuff him into your armpit while holding both legs together with that hand. Carry him around for awhile. Anytime he threatens you catch him and repeat it. With my turkeys such an episode will make sure that they...