Only two, we realized what did it and took care of the issue. We have six foot chain link fencing, three great Pyrenees, then additional fencing inside of that fencing. Opossum are really stupid but they are still motivated when it comes to food. I was fairly upset as both chickens were hens sitting on eggs that were nearly finished, and the first one was a favorite. Night before last I watched one b line for the road as I approached like it was a muzzie eager for virgins. They're terribly dumb. But apparently they pattern predators.