I have been looking around in different forums and checking out different chum recipes. I do not have time before my next trip to let anything rotoooh: in a bucket so I am going to give the dog food a shot. When I put the chum out do I need to sink it all the way to the bottom or just let it kind of float on the surface? I know in saltwater we usually just dump the chum on top of the water wich creates a slick on the surface, but I do not know if this works for cats. Thanks.