I have eight yb's that are approximately 75 days old. They have all been out of the loft at least twice per week for over a month. I never force any of the birds to come out of the loft, so some have only been out a few times. Two of the birds were good flyers who could be out overnight if they chose, and would always make it back. Now that all of my birds come out, they won't leave the yard. Should I continue to let them out and wait for them to fly on there own? Is this typical?