I have two 5 week old Pekin ducklings. Both of them absolutely love the water and especially the mud. They both play in the mud but one gets exceptionally dirty and it looks like when she poops it stays on her bottom. I'm a little concerned but I think she may just be a dirty duck. We think that one of them is a boy and one is a girl. The one that we think is the girl is the smaller one and I hope that nothing is wrong with her and that she may just be a little lazy. If anyone has any advice I really appreciate it.