This will of course change my project. I still have Sherman, who shows no symptoms, and I have several pure Liege hens, who show no symptoms. So I will breed those and see what happens. But they haven’t had access to the free range flock where I think the virus was or is living.
But the birds that have passed the test of time to this point (at least 2 years) with no symptoms are:
1. Lanky: half-Cracker, half-American game.
2. A barnyard layer cross of 2 different layer breeds.
3. Several black hens that are half-Indo, half-Cracker. Indo himself being half-aseel, half-Liege.
4. A half-Cracker, half-wyandotte, hen.
5. A half-Indo, half-Austrolorp, hen.
Those are the chickens that have lived free range for a long time with zero symptoms. Lanky had been cooped a while but he grew up free range.
I don’t have Indo on the list because he got weakly for 2 weeks when he was a chick turned out to free range for the first time. He’s a strong, healthy, adult now and he seems to throw strong chicks that have survived with no symptoms when crossed to Crackers. But when crossed back to Liege none of his chicks have survived. He also has an odd pupil to my recollection that doesn’t really look like Marek’s to me, but I’ll post a pic tonight.
I also don’t include the straight-combed, half-aseel hen I have. She shows no symptoms and is old enough to have manifested them. But I also kept her somewhat isolated from the free range flock. I have her on free range now. As much as I prize her, she has to survive and thrive in order to be of use to me. I know she’s tough because she grew up wild off farm. But I don’t know if she’s been exposed to the Marek’s yet.
The Indo x Cracker hens seem to be the most prolific. I have several running around with a healthy looking appearance.
I may return to crossing Crackers and “terrorfowl.” It won’t give me the crazy looking dino bird I want but it may give me a yard full of resistant, athletic, chickens, and then I’ll have to shape the birds from that base.