My pullets are 14 weeks old. I have a total of 20 pullets and roosters. I lost some chicks to neighbors dogs and replaced them with productions chicks (sex-link). The new chickens are like a flock within a flock. The original chickens took to the roost without any problems and the new birds want to roost on the nest perches. Anyone have suggestions or ideas on how to get the production birds to roost with the rest of the chickens on the roost that was built to be a roost. The structure built for the roost is trellis shaped and leans against the western side of the house. The nest boxes are built on the northern wall with access from the outside. There is a perch (rod) for the hens to stand on before entering the nest and this is where the newer chickens are roosting.