I don't want to fall out with my new neighbour but I am sick of his dog defecating on my lawn. He is over like a shot with a bag to clear it up, but the large beast scrapes at the soft wet lawn and is putting huge muddy ruts in it; plus i don't want my little ones crawling over recently-dumped-upon areas. My garden is also used by the neighbourhood cats. I had slightly hoped the new arrival of dog-dirt on my lawn might deter them but if anything it's got worse. I looked online and there are whistly things and chemical sprays that are supposed to keep them away. Has anyone used them? Do they work? When I came back from work tonight there were (still are) two piles of different-looking cat muck and big scrapy marks from the dog. If they don't, I have a big roll of chicken wire I could stake out on there to keep them off but it's going to look pretty stupid. Thanks in advance.