Olsen is a very energetic dog with lots of drive. We have had Olsen since he was 5 months. He has grown into a lovley natured dog, who loves almost everything (not cats). I do a variety of exercising with to keep him fit. His pb on weightpull is 1440lbs this was on a rail system. He loves a-frame , boomerball (which i highly recommend if your bully loves balls) , ball launcher , i have to say this is most probably the best toy i have bought for my dogs before i had this going to the park was a nightmare as soon as Olsen saw a football he was off like a shot but all he wants now is his ball (rubber not tennis) , weightlifting on a pulley hanging of the gallows , biking , flirt/spring pole , swimming when the weather is warmer as we live by the sea . Just recentley we have been introduced to lure chasing which is exellent for dog and owner alike getting out and meeting new friends with the same interests DOGS!!!