i have a Pekin duck that is around 4 months old. While we were gone for 2 weeks, the person caring for the animals said the duck was acting weird. I'm home now, and the duck has trouble walking. Also, it appears her sense of depth is off. It takes her several tries to put her bill in the water bowl, and she loses balance very easily. She's a lot slower than the others due to her lack of balance, so she sits by the water spigot while the rest go forage. What should I do? It's pitiful. 

