As a know-nothing homeowner, I am perplexed as to why my black lab (came along with my new wife) is killing the grass when she does her business (#1) on my grass. It looks like someone sprayed roundup on it. First, does Scott's patchmaster work to fix dead spots, or is there another, better way? Second, how do I prevent this from happening in the future. FYI - getting rid of the dog is not a viable option. Some have suggested lime, but I can't exactly follow her around with a bucket of lime every time she goes outside.... Thanks in advance for your help with this unfortunate situation.