corbinam
Moderator
I first tought him to go backwards (look for "Rear end/back legs tricks" from corbinam)
Then I searched for small steps:
1. folded blanket
2. some books
3. a shelf
4. a shelf on two books (try it near the wall, so it can't slip away...)
5. a shelf on four books
...
10. when he learned to go backwards on one normal step I let him stand an then told him the back-command for the next step
11. more and more steps
R. m. Q.
Thanks! I will have to give this a try!