Hi, this is an exciting topic for me! I am also interested in heritage breed, because, first, I don't want to keep buying the whole young stock or eggs, and, second, I love watching hens with chicks, or raising little ones I incubated. Besides, selection and improvement are very exciting!
I only started keeping poultry in 2022, there are no success stories yet to speak of, and I have a rather limited access to quality heritage poultry here in Uzbekistan. Last year I hatched some Jersey Giants, who grew to be rather mediocre specimens, but still larger than the mutts I had before them. I also bought two JG roosters from other people. This year they are giving progeny, but I expect the JGs out of them to be very mediocre, too. And I must confess that I messed up the selection part this year, as my Jersey hens were not as productive as I expected, so I ended up incubating basically ALL eggs they gave me when I needed to incubate.
However, the interesting part is that I also bred some crosses this year, out of my Russian Kuchinsky and Amrock, and those Jersey roosters. And THESE seem to be much better than my purebred JGs. They are way larger, growing fast and maturing much faster than my other birds. I am not sure if it is normal for roos to start crowing at 9 weeks but this is what they are doing.
Sorry about the poor photo, it is just to give a bit of an idea. The black ones are those Jersey crosses (and maybe an occasional pure JG), they are about 9.5 weeks now. I think I am liking them. I was going to get rid of JGs gradually, but I will see how these turn out; maybe I will want to keep at least a JG rooster and some dual purpose hens (not JGs) for such crosses.
Can't say anything about the weight yet but I will let you know later. For now, these are growing much faster (and different) than my last years' JGs (their ancestors). But I also feed them better, as I learned a bit.
View attachment 3829123