I have 8 ducks total. 2 pekins, 4 khakis, 1 buff and 1 blue swedish. The 2 pekins and 1 buff are around 2 to 2 and a half months old. My khakis are around 4 to 5 weeks old. One of those khakis is biting at the older 3. Lots of space for them to move around. Does it in the pool and when they eat...
I have a duckling that is standing, opening and closing its eyes and wobbling back and forth. Not really walking around until you get close to it. Not really moving its neck much either.