At first she/he was foaming at the mouth (not out of the nose).now just a lot of drool ..they have water with their food ,not mixed just with it.I did let them swim for the first time in shallow warm water. So is it normal or what is wrong
Is she walking normally? Botulism poisoning causes them to look like they are drunk.
I would give her activated food grade charcoal in water right away. You can get it at drugstores, often, or health food stores. Or, if you burn only clean wood, you can grind up charcoal from the woodstove. Do not use the briquettes for grilling, they have nasty petroleum-based chemicals in them to make them burn faster.
There is a sticky for doing a digestive system flush, if you think she got into something.
Another thought is a sting. The charcoal may help with that, also.
I would put a couple of tablespoons of powdered charcoal into a pint of water for her.
It won't hurt her or any of the other ducks, either. It absorbs toxins.
Is she shaking her head as if to try to get something out of her mouth? Any swelling that you can see?
She may have been bitten or stung, or got something ouchie in her mouth or throat.
Can you take a look? I know that may be difficult.
Do you have any apple cider vinegar (preferably unpasteurized)? I would put a teaspoon of that in a quart of water and give it to her. Just don't use a galvanized metal container.
Something else you could do, that may be even better if it's a sting, is soak some oatmeal (not the flavored kind, just plain oatmeal) in some warm water and let it cool, and give it to her. Make sure it's nice and wet and runny, mostly liquid.
Also since she is so young, have you been giving her chick grit? I would not give the oats if you have not been giving them a tiny bit of chick grit so they can "chew."
Just keep an eye on her. Make sure she is eating and drinking and pooping. How warm was the water? How warm is the brooder? Read the link I gave and just check the basics of food, water, bedding, heat, and so forth.
Please send an update - I plan to check in the morning.
It was as warm as you would make for babies. Maybe in the Tub 10 min long enough to clean the border out. they have there game bird starter and fresh water. I don't think she got soap I sprayed the tub first. Eating ,drinking , and pooping good..but still drooling