Well, I don't know if this can help, but when you asked again, I remembered when the hatchery shipped us juvenile pullets. They were fine when they arrived, but a couple of days later started sneezing and coughing.
I emailed hatchery and received the advice to spray a couple of spurts of "FOUR WAY NASAL SPRAY" BRAND NAME ONLY.
It has something special in it that works for birds.
It worked great. And chickens felt better right away, breathing better. I gave it to them according to directions... I think every six hours. Yes, I missed some doses, but it did work, and they were better in a couple of days.
I wonder about Vitamins, and fresh water, antibiotics, invriroment, other turkeys at risk?
How old is your turkey? maybe you already said.
Best wishes,
MK