These animals were then engineered further for its meat. Although most people believe double muscling means the cow has two sets of muscles that’s incorrect, they just have double the muscle bulk. This is achieved by breaking the gene that controls the secretion of Myostatin, a protein that inhibits muscle growth after a certain point of development.
If my dog won't eat genetically engineered food, and the birds that visit my bird house won't even touch genetically engineered seeds even during winter when food is scarce at best, I think it's only reasonable that it isn't safe for me to eat either.
Makes an interesting science experiment but nothing more.