thanks we brought Hydrillia from the Potomac River into pond from a stagnant cove, im sure it was contaminated by wild waterfowl. two of the brown khakis survived, one looked like it was going to die , but recovered. Got 9 non fly away Mallards on Craigslist for free :)
I just had a Pekin and Brown Khaki die suddenly last , both their necks were stretched back along their bodies. They were acting a little lethargic the previous days. We have a small plot of corn, hay in the small duck house next to pond and had just put Hydrillia from the Potomac River in there...