My chickens are going on 14 weeks old and used to make little peeping noises all of the time. In the past 2-3 weeks, they stopped peeping as often. Once or twice I heard sounds resembling a cluck which I saw as great progress. However, in the past week and a half, they have stopped making sounds at all. Is this cause for concern. I was worried that they were not drinking enough water and perhaps this was causing it, but now I am starting to think it may be something more. Just wondering if this is normal, caused by hot weather, etc. Any advice would be much appreciated!