Pigeon source.

Trap the shooters....

Get in line for homers, unfortunately. I am driving to PA to pick up some squeakers....that is how bad it is getting.
If you can find where they like to roost just go catch you some with a net. You can also trap them. The ones I have now where caught under a bridge on I-75. I initially caught 9 and 5 of them decided to stay since then they have raised 4 more. If you want them to home just keep them in the loft for 4 or 5 weeks before releasing or wait till they hatch little ones. You don't really need homers unless you are training a long way from where you keep them.