I've had this problem before and it's super annoying. One thing that has helped is to go out every evening for a couple of weeks and close off the nesting boxes. It's a pain but eventually they find somewhere else to sleep. If you do this, don't forget to open them up again in the morning so the...
Welcome to BYC and to chicken keeping! It's quite typical for chicks to feather at different rates. Some breeds mature faster than others, males tend to get feathers later, and some individuals are just earlier/later than others.
Since it's hot where you live, there is more flexibility to the...
Feel free to post some photos so we can help. 14 weeks should be old enough to tell the difference mainly through the comb and wattles. The pointy saddle feathers grow in a bit later.