Have 3 one-month old ducks. They all seem to have a bit of trouble keeping their balance at times but one in particular falls over as if drunk. She lands on her back can't get up. Last night she got chilled from falling over and being wet and trampled so we blow dried her and stuck her in an incubator for a while and was much better so we put her back in brooder. Woke up to her stuck on back again. Helped her to stand but she's so wobbly when she walks. She's been getting brewers yeast and I just put them back on vitamins and electrolytes. Anything I'm missing?