First decide which tom you want to keep and get rid of the other one.
In the meantime separate her from the toms.
Look around and see if you can find some other young hens locally.
A necropsy is likely the only way that you are going to determine what the problem is.
Another issue that can cause similar deaths is botulism.
Sorry that you are having this problem.
Based on that information, it is definitely a site based issue.
There is a commercial hatchery that was blackhead free for 20 years which suddenly began having blackhead issues.
They were also almost wiped out of the turkey business by black gnats over a couple of years.
Way back when, I used to use old denim pants for smoker fuel. With all the fire retardant additives now, I gave that up. Nowadays I don't even use a smoker on the bees.
Replaced the living room ceiling light. It is operated by a remote control which did not come with batteries. No light because I didn't realize that I was out of AAA batteries.
Prayer for Serenity
Attributed to Reinhold Niebuhr, Lutheran theologian (1892–1971)
God, grant me the serenity to accept the things I cannot change,
the courage to change the things I can,
and the wisdom to know the difference.
After they are at least 3 months old and have their adult plumage.
There are physical and behavior traits to consider.
If people can't wait to learn the sex, they can use one of the DNA labs to do either a blood or feather test.
For new hatchlings, they can also be tested from the membrane...
Marek's should not be an issue as turkeys get a different form of it than do chickens. They make the Marek's vaccine for chickens from turkeys.
Avian Leukosis is mainly a chicken disease but can affect turkeys.
Failure to thrive is a broad cover all that can be caused by many different...