ok, hmm.
well the vet told me a vast number of factors can contribute to the illnes. in my case it was puting live bunches of grass in the ground in the pen. i must have brought the bug from the place i dug up the grass. or it was the new straw bedding wich caused their noses to run and in turn ignite a pre existing bug in their system.
can you think of anything different that has happend, maybe a change of feed or bedding. it could be seasonal too, it may happen once and never again. or you might see a pattern in the weather and illness.
it could be a virus the most common of troubles involving flue like symptoms, and their is nothing you can do ecept maybe try some herbal remadies for boosting the imune system of the turkys and chooks, i think garlic is one, it helps with the nasal pasagess.
i realy hope you have some break in the illness soon. its heart breaking to lose somthing you put your heart and soul into and have it taken away in just a day.
if things get realy bad maybe you could get an autopsy done and have samples taken. i had my chicken that died tested because their was a posability of bird flue....wich of cource wasn't but the symptoms are the same.
i hope it all works itself out soon.