
Before the Cornish X took over the commercial chicken meat market in the middle of the last century (around the 1950's) the main go-to commercial meat birds were the Delaware, New Hampshire, and certain strains of White Rock. Not all White Rock but certain strains were bred for meat production. The light colored feathers made a prettier carcass when plucked because the pin feathers were not as easily seen as there were with a dark feathered bird. Skin color was important for appearances too. Several years back someone posted a copy of an advertisement for Delaware chicks in the 1930's. The claim was that that specific strain of Delaware could reach 4 pounds by 10 weeks. I assume live weight.
After the Cornish X took over, those special strains of Delaware, New Hampshire, and White Rock were no longer bred as meat birds. While they are not a bad choice for a hatchery dual purpose meat bird, after 70 years of not being bred for meat I don't consider them all that different from other hatchery dual purpose birds for meat. Eggs either for that matter.
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White Bresse is the best hand down as flavor. It is dual breed and will take about 4-5 months to growth. I raised Dorking in the past for couple years, but it take twice as long to get the same weigh. It is also difficult to find good bloodline to add to the block. By the way, the White Bresse also tolerate wet weather condition much better.



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