You can do a search on Wizdog there are a coulpe disscussions on it
here are a few to start of with
http://www.yorkietalk.com/forums/sho...ghlight=wizdog http://www.yorkietalk.com/forums/sho...ghlight=wizdog http://www.yorkietalk.com/forums/sho...ghlight=wizdog http://www.yorkietalk.com/forums/sho...ghlight=wizdog
If you do happen to purchase the Wizdog , rember you need to put a sent on the wee , wee pad first dab pee on the pad or trainer aid.
In addition the grid has been changes , so puppy can not bit it anymore.
Chesley has been trying but can't get at it . Yippy
Have fun reading.