Dog waste removal

Question
We have a 30 ft by 30 ft dog area for our two large (100 lb) puppies. We put round Delaware rock down to get rid of mud on the dogs. The run is now covered in poop and the dogs stand by the gate to get in and out or walk around the edges only. We have no problem picking up after them, but we keep picking up the stone as well. Is there a way to fix this problem? Is there anything we can spray to disolve the poop? We have a sprinkler system that sprays water each doy so there is no smell, but even the puppies do not want o play in their space! Please help.
Thanks.

Answer
Hello and thank you for your question,

I am not aware of any product currently on the market that can disolve there feces sorry, It could be the dogs do not like running around on the rock...it can injury paw pads and I'm sure there aware it is hard to walk on, I'm not sure what you can do now with the rock there bu you could remove it and place in at one side maybe instead of gettin rid of it.