You use common sense, you put runners on the floors, you don't throw balls high up in the air for them to jump for.
You let them self regulate when it comes to exercise.
Wait to jog or run them until after they're 18 months old.
And by wait to jog or run them, you mean wait to jog or run with
Apsel der Schwarzbar -- Dark Sable -- 10/31/2013