I don't know for sure if it was because we had an older dog already trained - but training Bailey was much easier than training Lexy. She was totally done in one week - age 4 months. Maybe Bailey was just smarter than Lexy, though!
She was an older pup, however, and so was able to hold in longer than a tiny baby can.
We certainly have had an easier time with Bailey not being destructive and suffering from separation anxiety and boredom and I definately think that is because she has Lexy to keep her company.
KC and the Crew
Trisha's Rosebud is waiting at the Bridge - flashy fawn, floppy, docked
Alexis Rose - plain fawn, floppy, docked DOB 8/31/97
Bailey Bug Boxer - plain fawn, floppy, docked DOB 7/29/00
Little Miss Maggie May - flashy fawn, floppy, docked DOB 1/15/2002