Lethargic duck not eating or drinking

[Belovedturkey]

My duck Bella has been acting wierd for two days, she’s been a little slower than usual but still eating and drinking normal. this morning when I went outside she was sitting and wouldn’t walk, she was also opening her beak but she won’t quack. I’ve gotten her to drink a sip of water and another of electrolytes. When she stands she’s very unbalanced. She nibbled at some food this morning but then lost interest and I haven’t gotten her to eat anything. I also found her laying down with her neck atretched out. I have her in a towel with water and food separated from the flock right now.