Bumblefoot is a staphylococcal infection (staph); wear gloves while you remove the infection from her feet to protect both you, and her. The cheesy white substance in those wounds will be her equivalent to pus, and that's the part that must be thoroughly removed, both feet, or it will simply come back (usually with a vengeance). Soak your ducks feet for about 20 minutes in warm to hot water, warm water will soften the tissue faster than cold water. Do not let her drink the epsom salt water (if using epsom salts), as it's known to cause diarrhea when ingested. Test the temperature of her bath by inserting your hand & wrist into the water. Like testing a baby bottle, if it doesn't burn the inside of your wrist, then it won't be too hot for your girl. This is a pretty common affliction, so don't feel bad. Might as well check your other birds too, catching it early will make for speedy recoveries.
