Dixie has the Potty Patch and does quite well. Don't have a fence around our yard and we only tie her up when we're outside watching her. It has worked out very well. Need to keep the grass mat disinfected and on the line for a couple days but in the meantime keep a pee pad on the tray. End of the summer season we'll buy a outdoor grass carpet on discount and cut to size so we can rotate the grass mats. Just thought I'd pass this on incase anyone has thoughts on buying one.