It sounds like you're on the right track. Mental exercise is just as important as physical exercise Short obedience sessions, trick training, stuffed kongs or bones, treat puzzles or balls can all be utilized as well.
GSD's are working dogs, they're busy bees and most aren't content with just hanging around. Teach him to catch a ball while sitting when it's lobbed gently at him, I like a hollee roller ball for this as its soft and doesn't hurt anything if it bounces accidently. Teach "find it" and hide treats around the apartment for him to find, or use one of his favourite toys to hide. Have him practice long down stays on a kitchen mat while you're making dinner.
There are lots of things to do to help stimulate them and give them a "job" to do
Jasmine - Female Miniature Poodle - born Aug 15, 2010
Loker Delgado Von Stalworth - Male GSD - born Jan 26, 2012
Koda & Zazu - 5 year old male cats
Alex - Male Cocker Spaniel (rescue) - RIP Cuddlebug 2007-2010
Last edited by Shade; 09-23-2013 at 09:31 AM.