[belvis]

Hi I got to my allotment today and let the chickens and ducks out only to find that one of my ducks was behaving oddly, she couldn't keep up with the rest of the group and kept stumbling over, I have brought her home but she seems to be deteriorating. She hasn't eaten anything and it doesn't look like she is drinking either.
She seems to have lost weight as well. I don't normally handle my ducks but when I picked her up she didn't stop me and felt quite light compared to the others. Can anyone help? Thanks in advance, Paul