Matt and I differ on the timetable for laying.
I want my females to lay no earlier than 8 months. My reason? If a pullet is good enough for me to keep as a breeder, I'm going to use her as such. I won't keep a bird that long if I know it's not going to be worth anything. So, by allowing the birds to wait until 8 months before laying eggs, the reproductive tract has a longer time to develop and also allows for a wider pubic bone spread. This means the eggs won't remain as small for nearly as long as a bird that lays at 6 months. So while others are waiting on their eggs to get some size, I can start setting eggs within a week or 2 of a pullet laying. I also won't be "wasting" eggs that could be used for hatching the next generation because they are too small to hatch from.
The purpose of chickens however is food, not just producing the next generation. If they reach proper size in a shorter amount of time the comments about the reproductive tract and pubic bone spread are no longer applicable. Nor is the "pullet" eggs, although I don't understand the concept of wasting eggs. If you have an aversion to setting allegedly smaller pullet eggs, they make great eating, which is after all the point of chickens to begin with. Egg size has no correlation between final bird size either, there may be some differences in the first week of life but after that they are indistinguishable and genetics take over.
As for the males, I want the males to get to their maximum size. To me, having a male reaching sexual maturity fast means that they are simply busy breeding instead of building themselves. I prefer a male that starts breeding anywhere from 9 months or more. Course, they don't start looking ready for show until well after their 2nd year. That's more along the lines of feathering though and not the actual frame and mass.
I agree on the feathering. As noted previously, faster growth and maximum size are not mutally exclusive. Also keep in mind it's not the bigger the better, there is a standard weight. Attaining a good butchering weight in a reasonable time frame should be important, because again, chickens are food. Slow growth is also an indicator of decreased vigor and weaker genes, why pay to feed an expensive animal without some sort of scientifically provable incentive?
Could someone breed for faster developing and maintain size? Absolutely! But let's just take a look at the production aspect of this. Leghorns (production) are a small breed and are meant to lay eggs earlier in life than other breeds. They can start laying eggs as early as 4.5 months in some strains. BUT, the size of the bird is small and they do not produce for a long amount of time.
Your first sentance here is the key. It CAN be done. Why should it not be? As far as the production Leghorns are concerned, you're right, they are very small, and do not produce for a long time because of that. That's because they are also bred for feed conversion ratio, it takes more feed, and thus more cost to fuel a bigger bird. That's where the true tradeoff is.
Meat birds grow fast as well, usually in about 6 weeks. They are useless as breeders due to their bodies simply not being able to keep up their rate of growth for long.
Agree
I'm just saying that body size and production are inversely correlated. In order to get the size without ruining the integrity of the frame, you need to allow a bit of time for the body to shape up. Pushing it to fast, especially expecting a bird of that size to begin laying eggs at 6 months will (without good and intensive breeding practices) will result in a smaller bird.
No they aren't. Although your last words here prove my point, good breeding practices are key. Basically you have three factors: Size, Production, Feed (technically Calorie) Requirements, pick two. You can have a big bird that grows fast, and large and is productive, but it's going to consume a lot of feed. Or you can have a small bird that is productive but doesn't consume much feed. Or you can have a big bird that doesn't have the huge calorie requirements, but it's not going to have good production qualities because it will grow slower.
It can be done, but be sure to not sacrifice the size for the early production.
Sacrificing size would be sacrificing breed type. If you read the early documents on the Langshan, late production is also sacrificing breed characteristics, There are historical documents proving that the breed used to meet the quicker production time table, and filled it well. To be good stewards of the breed we need to strive for both.
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