Yeah pigeons are easy to keep. I started the same way, my dad bought a few for training our hunting dogs (they weren't killed either) and I built them a large coop/aviary. Pretty interesting birds, and they're easy to breed too. Lots of cool varieties out there. I raised Homing, Rotors and Tumblers. I use to let them out to fly and they always came back. But like Fish Eat Fish said, I had bad problems with hawks trying to catch them.