One of my girls has what I call a bedtime song. She goes in the coop at bedtime and calls the other girls in. Well last night I noticed her song is not the same. She sounds like a goose honking or like a chicken trying to bark like a dog. Should I be concerned or are they just going through voice changes? She is 10 weeks old. I did notice they aren't making the same little peepy noises anymore. They are starting to cluck like big girls!