![]() Yes they can have a heart attack and it makes it harder from the to breathe also. Why is this breed not recommended for altitudes above 5000 feet They have been developed by a number of different genetics companies and selected for their fast growth and bulk of meat they produce. Our Jumbo Cornish X Rocks are a commercially bred strain. What strain are your Jumbo Cornish Cross? They will not produce the same high quality in the next generation and due to the extreme rate of growth they will be too large at time of sexual maturity to breed successfully. Jumbo Cornish Cross are hybrids, therefore we do not recommend breeding. Not recommended for raising at altitudes above 5,000 feet. Our Jumbo Cornish Cross (Cornish X Rock) are among the finest meat birds in America - we fill our own family freezers with them every year! Males are ready to process in just six to eight weeks, and females will take about one and a half weeks longer to reach the same size. Buying straight run chicks gives you some of each sex so that you can take advantage of the strong points both ways. Whether you are looking to raise these top-selling meat birds for your own pleasure, or to raise and sell, you won't find better.įemales will have a fine, smooth finish when dressed, and reach beautiful roasting size. These broiler chickens are known for their remarkable, rapid growth and feed efficiency. Selective matings produce baby chicks with broad breasts, big thighs, white plumage, and yellow skin. The Cornish Cross is a hybrid developed by crossing the commercial Cornish chicken with a White Rock chicken. Our Jumbo Cornish Cross (Cornish X Rock) is the most remarkable meat-producing chicken we offer.
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