Quote:
For commercial production, it's more about maintaining the proper bird weight and thus egg size. The largest market, and best price, is for large eggs, so the flocks are managed to keep the average egg size at large for as long as possible. They recommend high protein feed from 17-35 weeks to get the hens' weight and egg size up rather quickly. At 35 weeks they hit peak production and production slowly declines from there. At that point the goal is to allow the hens to gain weight, but very slowly. This keeps production up, but maintains egg size, then as production drops the protein requirement drops.
We have a flock of 2500 organic layer hens. We started them on 18.5% protein last year and brought that down to 17% by the time they were 35 weeks olds. They were already rather heavy coming from the grower barn and we overfed them. Egg size went up rather quickly and we overshot the large egg size and maintained an average x-large egg size throughout the rest of the year. We get 10 cents per dozen less from our cooperative for x-large vs large eggs. Although we sold $92,000 in eggs last year, we lost close to $5,000 in revenue because of that.
We now have a new flock in the barn and are being more cautious. We started them on 18.5% feed, but didn't feed it as long before starting to lower the protein level. These birds were a little lighter coming from the grower barn and with us being a little more cautious, we are seeing a huge amount of pee-wee and small eggs, which we get very little money for. Egg size is coming up, but it could be quicker. It's a balancing act...