My chicken Penny suddenly stopped walking a few days ago, she can't stand at all and has diaherea, I took her to the vet and he said she was dehydrated and gave me medicine for it, but yesterday her feet became very swollen, it looks like her joints are swollen, so I called him and he told me I would probably have to get her put down. But she's still so alert and eating and drinking like normal and talking to me. It's hard because I feel like there could be a way to fix her. I don't know what to do, please help!