Build a loft. A cage might be too small. If they are old homers, breed them and fly the young. If they are rollers, you can resettle them for 2-3 weeks and you can release them. I am assuming that you are a beginner because I don't believe that Mike Tyson doesn't know how to take care of pigeons. He has lots of rollers. There is more than keeping the birds locked in and releasing them. You have to train them to trap inside, respond to your calls and be familiar with their immediate surroundings before any release. Do some search here because it is a big topic.