I got 4 BR turkeys (2 Jakes; 2 Jennys) in December,all juveniles not laid first egg but probably 6-7 months old & a little more than a week ago (so about a month after getting them); I really like them. They are incredibly tame and easy going. I noticed one of the Jennys was acting all droopy and lethargic. I checked the poop under where she had roosted and found the distinctive yellow sulfur poop.
It was Sunday before last so I called around and finally got a Vet to call me back & then to meet me at his office same day and sell me some medication (250 mg dimetridazole tablets -- actually 500 mg which I broke in half) which I started her on that very afternoon. The Jenny was not eating or drinking so I just put the tablet down her throat and she swallowed. She was better the next day but it took 2-3 days for the sulfur yellow poop to disappear. I kept her on it 8 days, 1/2 500 mg tablet put in her mouth, and the Jenny completely recovered, is doing fine & back out running around with the other turkeys. While she was quarantined, I de-wormed everything else with ivermectin & am going to worm again with Safeguard.
No Guinea nor the other 3 turkeys have shown any sign of the illness. I am giving the turkeys away to my friend because I understand blackhead pretty much stays on premises (and it was probably here before because chickens were here before we moved to the place -- never been any turkeys or Guineas here). I don't want to have to be constantly on guard against the disease with the turkeys as greatly impressed as I am with them.
I am hoping the Guineas are NOT as susceptible because they were hatched on my place in August and all have been healthy & active. Since nobody has had Guineas with blackhead, thus far, perhaps they are less susceptible. Mine were hatched and raised right in the coop with chickens.