I was wondering if anybody could give me some advice. I've had this duckling (Daisy) for 6 weeks. She is 6 1/2 weeks old now. When she used to drink she used to throw her head back. Since getting older this now does not happen anymore but from about 3 weeks we have noticed that she breathes heavy. She eats and drinks well and seems very happy. Could it be the bedding that upsets her even though it is Dust free and i change it everyday, or is it just what ducks of this age tend to do? Thank you.