"sit" was the first thing lilo learned at age of 10 weeks.
Treats worked for us good , but it does take a lot of patience.
Here is video of Lilos first "sits"
And second one is Lilo at age 3 mo.
http://www.youtube.com/watch?v=oS_kLuvVGCk http://www.youtube.com/watch?v=WvgcEX74wgk