I have read on this forum and heard from my puppy's trainer that mental exercise is almost as good as physical exercise.  Sometimes it is difficult to get Summit all the physical exercise he would like.  Any suggestions for some mental stimulation for a 7 month old?

 I agree about teaching tricks. Be patient. Plus it is always fun to show what your dog can do.  Easy ones are spin and twist. Of course I call them tornado and twister. Hand shake, wave, go back are a few steps.  We for Rest where she sets her chin in my hand. It is a prelude to put her head down like to pray. It is so much fun when they get it. They get excited too about performing their tricks.