Hey all! I'm new to raising ducks and we got our ducklings at 4 weeks old and they are now around 10 weeks old. 3 of them make a definite "quack" sound now, but the biggest one of the bunch (I'm suspecting it's a drake) is very very quiet. He still makes duckling chirping noises and doesn't have the throaty sound that I've heard other drakes make. Are there some naturally quieter ducks or could this be a sign of respiratory problems? Any advice is much appreciated!!