I was given 4 breeding pairs of homers and I built a loft from plans and now have 23 birds. I have been catching them and putting each through the bobs. Some have gone through the bobs over a dozen times and appear to know how to get into the loft. An hour before sundown and before feeding, I caught four young birds that were hatched in the loft. I put them in a cage where they could see the loft. After about ten minutes I opened the door and all birds flew around for a few minutes and 3 of them disappeared from sight. The remaining bird hung around until dark and in the morning I found the bird in the loft. I'm doing something wrong and do not want to loose anymore birds. I really need help getting the birds to home back after they fly. What are the steps to success?