For about three weeks now I keep hearing what sounds like a canary getting ready to sing, coming from my group of chickens. If you have ever had a canary or been around one when it was just getting ready to break into song, that chortle they do is what I am hearing from in with my chickens. I don't know who or which one is doing it. I have two cuckoo marans pullets, three partridge rock pullets, two red star pullets, three welsumer pullets and one welsummer roo. All just over 7 weeks old. Anyone got an idea of who might be my canary impersonator?????