I got three muscovies this summer, and they never swam in the pond. It was no big deal. I was just glad to see them eating all the grasshoppers, spiders and scorpions! I just figured that was a muscovy thing not to spend much time in the water. Now, what seems like overnight, they spend about 90% of their time on the pond. Has anyone experienced that? Their feathers were in pretty rough shape when I got them, so they didn't float that we'll on the water. They have nice feathers from molting, so they actually float on top of the water now. Is that why they have decided to hang out on the water? Could it be the change in weather?