Ok let me give everyone a web site to watch. NOTE I am not buying this system but will buy the 2 crates and hook them together to get the same training. I will NOT spend $500 for a hole cut out of the crate divider. (My next dog will be a gsd service dog).
https://modernpuppies.com/pottytrain...xoCr5kQAvD_BwE
I've been on this site twice and have referred some to watching the video.