I’m not sure that apparent homogeneity would be a reproducible trait, if you know what I mean. However you might be able to recreate it by surgically caponizing some of your little jakes.
From what I’ve read, turkeys are easy to caponize, but since they are customarily harvested at 6-7 months, which is on the cusp with regard to their reaching sexual maturity, there’s no point since the goal of caponizing is to cut off the testosterone before it hardens the muscle and fouls the taste (depending on the consumer’s palate, of course). I’m not sure that’s right, though. They start their characteristic male behaviors (strutting, gobbling) and physical differentiation from females way earlier than that. I got my Sweetgrass poults August 8th. I don’t know when they hatched... maybe they were a week old, so about thirteen weeks now. They’re too fast and too many (15) to tabulate how many males and females I have, but I’ve been able to tell them apart (most of them) for quite some time. Therefore it makes sense to me that there’s testosterone pumping already, presumably doing stuff to body and mind long before they’re capable of making fertile eggs. Does that sound right?
I’ve been studying about making capons of cockerels (haven’t tried yet—got no cockerels at present to try on), and apparently the best time is between 1-2 lbs. If you wait much longer, the testes get large and soft/fragile, making it really tricky to get them out in one piece (or at all) and do it without killing the bird. I don’t know, but I imagine the optimal weight for a poult would likely be similar to that of a
chicken, or maybe a little bit more. All of my turkeys are too big, but when spring comes and I start getting new poults, I might have to give it a go. Not right away, but once I (hopefully) get good at doing it on chickens.
I guess you can neuter a female too, by removing a bit of Fallopian tube. It’s my understanding that it isn’t necessary to remove the ovary (there’s only one functioning and it’s on the left side in chickens... probably in turkeys too) and that removing it would be difficult. In chickens, spayed females are called Poulards. Without the Fallopian tube, the pullet expends all her calories toward the rest of her body, putting on those yummy layers of fat. Poulards are s’posed to be even tastier (though smaller) than capons.