I gotta agree with MTD on this. I believe a dog needs those hormones to develope properly. You deny him those hormones and his body will develope differently. The way I see it the hormones act on a dog the same way they act on a bovine. Male bovine with balls=bull. Male bovine-the balls=steer. Their bodies, and muscular developement change, and I believe so will a dogs. Maybe not a muchof a physical change as a bovine, but still, why take a chance?