Er.. i babbled on n forgot to tell how most don't release select breeder pairs, and fly young from them. Keep in three to six pairs and breed fliers from them. train them to come home/to you every evening by feeding only one cup per evening per pair, as say sing whistle hum something or make certain noise or sound as do.. otherwise cut that ration in half after week to month of doing n no results from them. they'll associate the sound n you with feeding, then real training as their friend can happen. when releasing young or newly aquired birds, settle them by setting in all wire cage where they can see hear smell etc all around area. pigeons proven to use sonar and or echo location, something I've always theorized especially since best bred homers ceres seem significantly larger than average..
once they've had training and settling, with hold feed before releasing to fly for first time for one day. then a bob trap can easily be made with a coat hanger. you could easily cover most of shed door opening with netting or those magnetic screen doors.
