Well there are many ways to skin a brat. In my opinion, you breed for egg colour first and primarily and then you breed for conformation of physical appearance. Its a great deal easier to select for the latter- and much more difficult to fix the egg. But as I mentioned in France, the farms producing the darkest eggs are not at all concerned with the appearance of the birds save for their general health. Like any farm with two hundred hens all of the same breed and colour- I'm sure there must have been some beauty queens there but by and large -they just looked like chickens. The emphasis on these flocks has always been egg colour- and then of course the phenotype last. I wrote somewhere earlier about snooty purists in France- but was only paraphrasing what Madame - expressed to me through her interpreter. There need to be rigorous standards and some people are able to breed for both simultaneously.
For example, if I were to only incubate eight eggs out twenty laid by five hens and only four of those eggs were Chart Hue Seven; one egg Chart Hue Nine and three falling between Cart Hues 4-6- and Eight chicks hatched.
So eight eggs of sufficiently dark eggs hatched. Each chick is given a dab of melted crayon wax on the top of its head at hatching time so that the origin is clear as day.
I've saved the eggshell piece in my egg diary... In a few days I get a sense of which are male and which are female. The males hatched from the very darkest eggs will get an additional crayon wax identification spot (new colour) as will the females naturally. As the birds mature, the males with the best conformity - and lets say just five roosters hatched-
the birds with the best conformity can be conserved for future selective breeding- but unless it hatched from the darker eggs its not ideal. Its more ideal than the males that would have been born of eggs that you didnt hatch, but he's still not ideal. But anyway, what I'm trying to say here is -you can be very selective in which of this years hatch to breed from late this summer- but choose egg shell colour it hatched from as your first determinant- certain colour varieties will tend produce darker eggs but we've all seen exceptions -so just focus on egg shell colour at this phase.
That's the rate of mutation that you can see and there is very little else at work at this level. Physical and plumage conformations- that's the icing on the cake-
You may be very fortunate and discover that you have a rooster that's hatched with perfect conformation from a Chart Hue Six egg. Better to keep a close eye on the conformation of the hens anyway because the son takes after the mother- generally speaking- especially in shape -so if you have two roosters hatch from two eggs of the Same Chart Hue- pick the one with the best conformation or colour- but if its a toss up -always pick the sire that hatched from the darkest egg.
And people -UC Davis utilized this selection regime with some Rhode Island Reds - they effected the expression of egg colour dramatically in just five generations.

For example, if I were to only incubate eight eggs out twenty laid by five hens and only four of those eggs were Chart Hue Seven; one egg Chart Hue Nine and three falling between Cart Hues 4-6- and Eight chicks hatched.
So eight eggs of sufficiently dark eggs hatched. Each chick is given a dab of melted crayon wax on the top of its head at hatching time so that the origin is clear as day.
I've saved the eggshell piece in my egg diary... In a few days I get a sense of which are male and which are female. The males hatched from the very darkest eggs will get an additional crayon wax identification spot (new colour) as will the females naturally. As the birds mature, the males with the best conformity - and lets say just five roosters hatched-
the birds with the best conformity can be conserved for future selective breeding- but unless it hatched from the darker eggs its not ideal. Its more ideal than the males that would have been born of eggs that you didnt hatch, but he's still not ideal. But anyway, what I'm trying to say here is -you can be very selective in which of this years hatch to breed from late this summer- but choose egg shell colour it hatched from as your first determinant- certain colour varieties will tend produce darker eggs but we've all seen exceptions -so just focus on egg shell colour at this phase.
That's the rate of mutation that you can see and there is very little else at work at this level. Physical and plumage conformations- that's the icing on the cake-
You may be very fortunate and discover that you have a rooster that's hatched with perfect conformation from a Chart Hue Six egg. Better to keep a close eye on the conformation of the hens anyway because the son takes after the mother- generally speaking- especially in shape -so if you have two roosters hatch from two eggs of the Same Chart Hue- pick the one with the best conformation or colour- but if its a toss up -always pick the sire that hatched from the darkest egg.
And people -UC Davis utilized this selection regime with some Rhode Island Reds - they effected the expression of egg colour dramatically in just five generations.
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