So one of my little darlings (who happens to be the largest) makes this noise every so often when he's breathing. I can best describe it as, when (as a human) you have a stuffy nose on one side and it opens up for just a second then closes again. I certainly hope that makes sense. It's not a constant, just every so often is sounds like that with a few breaths and then it stops again. Both ducklings are warm to the touch (but I was told they run warm normally anyway compared to humans). They seem to be in good spirits, enjoy eating, playing in the pool, etc. Am I overthinking this? lol... this is our first time as duck parents and I don't want to fail them.