I made my own poop box using a plastic trash can. Basically, I dug a large hole, put a foot of gravel and sand on the bottom, then put a plastic trash can with a lid and the bottom cut out and holes drilled through the sides. Then I buried the thing with dirt so all you see is the lid. The trash can I got has this pop up lid that you push with your hand. Since it's buried in the ground, I just step on it with my foot to open the lid. So then I dump poop in there, put a scoop of Septonic and run the hose on it.
I think it works for me because I have raw fed dogs. Raw fed dog poop when just left out in the yard crumbles to dirt in 3 days...