I have 22 week old Wyandottes and RIRs that still haven't started laying. They have everything they need...layer pellets started at 16 weeks, oyster shell at 18, plenty of extra protein and green scraps. The birds are clearly eating well and look very healthy. Temps have started to cool off from the hot summer heat in Texas, but not cold so no sign of molting. They also have started acting strangely aggressive--not in a bad way--but they're not my baby chicks anymore. Are we close? Thanks!