I have a young drake and I noticed him limping and lifting his leg today. He is putting most of his weight on the other leg. He still looks very healthy, is eating fine and is behaving normally other than the limp. We caught him to have a look and couldn't feel any broken bones or anything, and the only thing we could see was this rectangle brown spot on the top of his foot. It looks like a healed scab of sorts as a small bit flaked off and underneath it looks healed. I never noticed an open wound and I visit the ducks 2+ times a day. Could it be an infection or parasite of sorts? If you have any idea of what this might be please let me know. I will monitor him for another 24 hours then look for a vet if it doesn't start to improve. Thanks in advance for your help.