Hello Everyone!!!!
My name is Kathy, but my friends call me Dr. Doolittle, and I am very happy to meet you all. In answer to the question, "How do you make Cornish Crosses?", you breed a White Cornish Male to a White Plymouth Rock female and you will get Cornish Crosses!
Both of the parent breeds are available at My Pet Chicken.com, but a word of warning the Cornish Crosses are not recommended for pet, or breeding purposes !! They are only recommended for MEAT production, because they are prone to health problems, due to fast growth and vitamin,and/or protein deficiencies!!!
They also do not breed true, so in order to have them every year, you must breed the parent breeds together every year to get them!!!
I hope this information helps to clear up confusion about this question, and GOOD LUCK !!!!!
Happy Clucking!!!
Dr. Doolittle