I have four....the juniors and the seniors. The seniors are an 8 year old Australian Shepherd mix and a 7 year old Beagle. The juniors are an 18 month old German Shepherd mix and, because she needed a playmate with her energy level so she'd quit bugging the seniors...we just rescued a 5 month old Pit Bull/Lab mix. He is quite a character and is a true pain in the tushy right now as he's not quite ready for training. We've started, though. All were rescues and all have sad stories.