My neighbors have two very nice dogs..... they also have a very muddy backyard. It has come down to the fact that they do not have a single blade of grass . Can anyone suggest ideas of what my neighbors can do to make it a cleaner environment? It cannot cost a lot of money..... They have a female who kills grass with her urine and a male who is on a very long chain which then pulls out the dead grass. Any suggestions would be greatly appreciated!