These worked great for me on what I wanted to do, I trained my ferret with these , Milo would not use his corner pan, so I layed one of these in my corner when he got use to going there , I gradually moved it in the corner pan , then he got the idea to go in there and i was able not to use them any more. worked out great for me and I lay one in his cage works out great and less mess with his litter he has in his pan..
as far as my dogs they just looked at and wouldnt use it ..Had better luck with newspaper