hi boykin2010 --
Here's what I have heard. The hen/pullet needs to be mature and been laying for 6-weeks at least for the eggs to be the ones selected for hatching. Gail Damerow says that by 30-weeks the pullet's eggs will be full-sized. One reason for that selection criteria is "smalll eggs laid by pullets or old hens will give you smaller, less vigorous chicks" page 276. So although my first egg, for example, would hatch if fertilized, and given the right incubation conditions, my pullet's first egg was 1.260 ounces, I think....and a normal egg approaches 2.0 oz or goes over 2.0 for my flock.
If I had hatched that first egg..I think that the resulting chick would definitely have been smaller and 'less virgorous', even if it had hatched and lived.
I am targeting a really healthy flock with strong genetics. The conditions here are kind of rough (Texas ranch, you can imagine).... and I just want to give any chicks the very best start. That is where I got my formula for breeding plan. It applies to me and my goals....and I realize other people have other objectives. For example, I suppose if someone wanted to develop bantam Cream Legbars, they would select the smallest pullet eggs possible and get the size and work on vigor later. Hope that makes sense.
Thanks for the question, it sent me back to my books----although I think that wasn't the quote. I remember mature hen and 5-6 weeks of regular laying before selecting eggs for hatching. So I wrote that time on my chicken-management-calendar.
I will come back and edit this post if I find the exact quotes....but by that time...there will be a multitude of posts into the future. :O)
Here's what I have heard. The hen/pullet needs to be mature and been laying for 6-weeks at least for the eggs to be the ones selected for hatching. Gail Damerow says that by 30-weeks the pullet's eggs will be full-sized. One reason for that selection criteria is "smalll eggs laid by pullets or old hens will give you smaller, less vigorous chicks" page 276. So although my first egg, for example, would hatch if fertilized, and given the right incubation conditions, my pullet's first egg was 1.260 ounces, I think....and a normal egg approaches 2.0 oz or goes over 2.0 for my flock.
If I had hatched that first egg..I think that the resulting chick would definitely have been smaller and 'less virgorous', even if it had hatched and lived.
I am targeting a really healthy flock with strong genetics. The conditions here are kind of rough (Texas ranch, you can imagine).... and I just want to give any chicks the very best start. That is where I got my formula for breeding plan. It applies to me and my goals....and I realize other people have other objectives. For example, I suppose if someone wanted to develop bantam Cream Legbars, they would select the smallest pullet eggs possible and get the size and work on vigor later. Hope that makes sense.
Thanks for the question, it sent me back to my books----although I think that wasn't the quote. I remember mature hen and 5-6 weeks of regular laying before selecting eggs for hatching. So I wrote that time on my chicken-management-calendar.
I will come back and edit this post if I find the exact quotes....but by that time...there will be a multitude of posts into the future. :O)
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