People have been really good at introducing hundreds of non-native plants and animals into the wild that have decimated the native populations. Why not splice an ostrich gene with a chicken and see what happens? Actually that might be kind of funny.
This is all beside the fact that they do not know how people's health will be affected over the long run. Although I guess it can't be much worse than the chemicals and preservative the food industry pushes on us now.
Giant chickens and fish, I really do need the next couple of weeks off.