HI my name is Steve I live in Milwaukee WI. I have a very small yard 30x30. When I let me dog out to go to the bathroom he pees in the same general area 5X5. Every year the grass is not only dead but completely gone. I have replaced it with sod and seed for 3 years and nothing seems to help. My yard looks like hell and I hate it is there anything I can do to prevent the grass from dieing besides keeping the dog off it?