I agree with everyone here. While feeding a diet of mainly sprouts could maybe be possible, it would take a lot of work, and even more research to get the right ingredients, proportions, and supplements right. As the OP now knows, sticking to a diet of layer pellets is probably best both for them and the birds. Thanks to the OP for realizing this and for apologising for your first reaction, as well as for realizing that you (like we did) missed a couple things that people had said