Toby is just over 4 months old. I was worried about it, but you responses didnt help!
But Thank you anyways. I live in the desert, so there is no real way to remove the rocks, because it is just rocks and a tiny bit of sand out there. He eats all sizes of rocks, so there is no way I could remove them. I was so exctied about getting him a yard so he would run around out there without me watching him every second, but his safety is more important. I might bring this up in puppy kindergarden class tonight and see if she has any suggestions.
Thank you so much for the replys, I was really worried and I guess I was right to be so!