Peking duck downy missing

[emnollie]

I have two 2week old Peking ducks I've have them since they were nine days old and I haven't seen them being rough with each other but one of them I have only just noticed has a stripe of downy missing down it's back. She also doesn't seem to want to get up and walk much unless she's running from us because she isn't used to humans just yet. I was worried about all the missing downy she doesn't seem to be growing as well as the other duckling and I was wondering what should I do? Take her to a vet? Give her different food?

[critters]

The bird expert will be along, but that's an interesting question. We had 2 of them when I was a kid, one of whom had seizures.