On reversion to wild type, the distinction between light and heavy breeds must surely be as significant for performance as is personality traits ('flighty' or whatever). Modern meaties are fit only for eating, and in evolutionary terms, that's a real dead end (pun intended
) Natural selection is never going to favour being someone's dinner - unless you're a parasite who needs it for part of your lifecycle of course - but I digress; we're talking chickens.
Heritage breeds were often designed to be dual purpose, so decent layers, and a decent table bird in the cockerels and the tired old hens. The extra size that makes them brick shape may be one of the first things selected out again when they are not confined and entirely dependent on a keeper for all their needs. Anyone got experience of this? For example, reduction in size and weight of offspring of e.g. Australorp, Dorking, Ixworth, Norfolk Grey, Orpington, Sussex.
) Natural selection is never going to favour being someone's dinner - unless you're a parasite who needs it for part of your lifecycle of course - but I digress; we're talking chickens.Heritage breeds were often designed to be dual purpose, so decent layers, and a decent table bird in the cockerels and the tired old hens. The extra size that makes them brick shape may be one of the first things selected out again when they are not confined and entirely dependent on a keeper for all their needs. Anyone got experience of this? For example, reduction in size and weight of offspring of e.g. Australorp, Dorking, Ixworth, Norfolk Grey, Orpington, Sussex.

But, Tull and Sylph were far from being mature enough to interest a male looking to mate and this is what I haven't been able to find observed behaviur studies on. Do they spend a few weeks/months as a sibling group until maturity and then find mates? Do the studies pick up on this? Judging the age of fully feathered chickens is difficult in the best conditions unless one has followed from hatch. That's a lot of time in the jungle. Most of these studies are carried out by students under the authership/guidance of the tutor. Most students do not have weeks and weeks of field work in their degree.
