New way to Neuter

There is a shot they are trying out, I forget the name.It will shrink your dogs um...your males dogs....you know whats LOL.(ten months old or less i think, no adults)
They give them two shots one for each side.Anyone heard of this? Wouldnt this be GREAT instead of using surgery?
Apparently it still leaves some doggy testosterone,so they may still be "manly dogs" to a point.They just cant reproduce.The procedure takes about ten to fifteen minutes AND you get to take your dog home right away.So far there is not a shot out for cats, but they are working on it!
They said nothing of side effects as of yet.