It works, more popular in Texas where they have to feed due to drought, soil type...
As mentioned it lowers testosterone levels so you have to taper off around September, but it’s a great feed that’s more affordable and high in protein.
I asked a biologist from the UGA deer lab that very question and he said if it were the only source of food then becoming sterile might be an issue but since they have other sources of food it wouldn't be a problem.