I have two racing young birds which is my entries for the race this season. They are about 2 months and a week old, and been flying for about 3 weeks. Once they were out for exercise, I noticed that two of my young birds are flying around the loft and when the others start to land and start trapping to eat, the two said young birds are still flying and slowly getting higher and higher then starts to disappear for about 4 to 5 hours. I am sure that they are really hungry before I let them all out.. but when they came back, they surely get in straight inside the loft to eat without staying outside or on the landing board.. Is this normal? Any idea? Thanks!!!