Nope!! That's not it!!

Under the watchful eye of Big Kitty, Pinkerton has ignored his first post sitting lesson of 2013. 

He just doesn't get it!!

The first mistake?  He picked a post that is even with the plank in front of him. 
Pinkerton!  Look for a post that's higher than the fence it supports.  That way. you can get the proper back end to front end support and the tail will sit quietly in a cute little curl beside the back feet.

Big Kitty!!!  Demonstration please!