As long as it has not been sprayed for bugs recently and it is an area where other animals do not go potty. I would also limit him on time so that he does not get another upset tummy.
What do you mean limit his time? I have Bermuda grass. He loves eating it. But i dont let him eat much. I just try and get him out to exercise. It's hard keeping up with him lol
Fertilizer is put on my yard but they said it's safe for pets once it dries. But i was concerned about that so i let him eat out of the yard beside my house which is abandoned. So i know the yard hasn't been treated