I'm worried about one of my ducklings, Scuba. Scuba always shivers when I take them around in their basket, (Stops when I hold him) and he's breathing faster than the others. I think that Scuba is developing a little bit faster than the other two, he is a bit bigger (always has been) and has more feathers coming up on his back. I'm going to move them to an outdoor pen today*. They are about about 2 1/2 weeks old. Should I be taking any measures or just attribute to growing and carry on? Scuba has a great personality and I want to keep him healthy! Thanks! *We will have a thermometer in there and will be keeping an eye on the temp, and bringing them in on cold nights. It's really warm where I live right now.