I made a post a few days back asking about a wild duck living in my bush, and today my fears came true. A cat attacked the duck, and broke one of the eggs. I yelled from inside for the cat to "Get" and it left. The mama duck (A mallard, I believe) walked around for a bit and then sat back down on the nest. Is there anything I can do or put down to keep cats out of the duck's area? I never had a big problem with predators in my area, besides some stray cats, but now there have been a lot of different animals around. I don't intend to do anything like relocate the ducks, as I don't think touching them is legal, but I'm just trying to find some sort of spice or spay I can place down that will not hurt the ducks but will scare away any cats or muskrats.