When I had Dusty, Roxy, and Teddy, it wasn't to much harder. You pretty much know your dogs personalities, so it's easy to tell who's to blame for what. lol. Others above are right, usually, two are playing, leaving one available for one on one time. In a sense it makes it a little easier for quality time.

Just more pee, poop, barking, food, and vet bills. lol. Good luck!