I seem to have ended up with very few of the meat hybrid x leghorns, but perhaps they're more vulnerable to incubator issues (and this time around the temperature was being a pain in the whatnot).
But I've got a really nice pullet doing well, and also a chunky great cockerel.
There are other cockerels that appear to be this same mix, but either they're favouring the leghorn side of things, or they're some strange outcome of the ancona x red layer that was in the same incubation. They're a fair bit bigger than the ancona x so I'll keep an eye on how they mature.
Meanwhile I'm pleased with their shape, growth and overall state of health. Remember these birds are completely on a home mix including kefir, and have had no coccidiostat after the first week of age. They've been on damp ground, and daytime temperatures have been mild mostly, but are currently high (over 33C).
I'm moving them once weekly, and by that time the green you can see in the photos above generally gets trimmed back to large patches of bare soil. There's no doubt that these birds are copping their fair share of whatever's in the dirt, but they haven't had a single day's setback.
They're just coming up to 6 weeks of age, so their most vulnerable time is nearly over.