That´s funny because by off chance I received the clicker and book about cat training I ordered yesterday evening and started mine as well so now we can compare notes ;-)
All I´ve done so far is introduce them to the sound and called them - which is not a new trick - they both know their names and come about 50% of the times they´re told, but the clicker and the treats made it 100% yesterday

and they seem to have a lot of fun. Can´t wait to see how well it works.
As always it has been Keira who picks up the idea first and when he saw that treats were at stake Leon quickly copied her.