i have a 2 acre fenced in back yard with a regular cement swimming pool. I have free range chickens and they do not come up onto the cement walk around the pool and have never tried to drink from it. But I am getting some ducks and know that they will find this pool to swim in. I know it would be messy, but I am worried what the pool chemicals would do to the ducks. Would they drink the chlorinated water and get sick? Any suggestions would be helpful. Thanks