My husband and I rescued some ducks. They were first in a pool and we have dug a pond for them. For a few weeks the ducks loved the pond. Over the 4th, our grand children were here and had gotten into the pond. Now the ducks will have nothing to do with the pond. My husband and I have put the ducks in the pond just for them to get back out. The pond is 50'X25, and 4' deep with a filter. No problems up till the kids had gotten in. What do we do to get the ducks back into the pond?