She had one friend.But he passed away 2 week ago.But she was ok.Even two days ago she was playing with us. .We always give her time and play with her since her friend is no more.but now she is quite and is eating less.I am giving her electrolyte. she isnot drinking it unless i woke her up and put the electrolyte water beside her.At 6 am she had her feed a little but now she isnot willing to have her feedThe white is normal. Birds do not make urine like us, they make uric acid instead. When it mixes with water it makes a white paste. They also only have one opening to the outside, the cloaca so basically poop and pee mix before leaving.
The behavior is not normal though. How many ducklings do you have? Is she lethargic? Sitting with her feathers puffed up?