Are these your only birds?The nesting boxes are in line with the the highest roosting bar, so I now know I need to address that issue and lower the nesting boxes or raise the roosting bars. The total roosting bar space is 8 feet of 2x4s with wide side up. Currently all chicks could fit on one bar. With room to spare.
Probably better to lower the nests.
Pics would help immensely if you want specific suggestions.
I have had many chicks sleep in the nests..so I rigged a cover.
Close it an hour before roost time, then uncover when I lock up after dark.
Easy Peasy! Also very handy when breaking a broody.