U_Stormcrow
Crossing the Road
But that's my point as well - how frequently did the heritages lay in those conditions? Were hybrids raised in identical conditions to see how they laid? Where do the numbers come from in your first post, since the feed recipe offered above is nowhere close to them?
What other sources of nutrition may have been available to them? Or did the birds simply compensate for the deficiency by eating more until their crude protein needs were met, putting on excess calories as stored fat? (that is, compensating for reduced nutritional density with increased feed consumption)
"Thrive" seems a very strong word for a feed offering well subpar that offered by US farmers100 [edit] 150 [end edit] years ago to get less than 150 eggs per year from leghorns.
What other sources of nutrition may have been available to them? Or did the birds simply compensate for the deficiency by eating more until their crude protein needs were met, putting on excess calories as stored fat? (that is, compensating for reduced nutritional density with increased feed consumption)
"Thrive" seems a very strong word for a feed offering well subpar that offered by US farmers
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