When I was putting my mallards in their pen tonight I noticed some odd behavior. I had to chase them out of the pond as usual and when I was herding them into their pen they kept laying down and shaking their legs almost as if they were trying to scratch. I've been trying to read online but I haven't found much. The closest thing I found to describing their behavior said that they are trying to warm up their feet. Is that what they are doing? We just got cold here recently and we just got the first snow that stuck on Christmas Eve and the pond they swim in is starting to get ice in it so I'm sure they are getting cold.