Hi, I free ranged my chickens in the old house. We lived on the edge of a city and the property was chain link fenced. We went a year with no problems then crows killed our young geese and ducklings. When we moved to this house, we were working on the chicken house but it wasn't done. We left the chickens at the old house thinking it was safer. The first night we were gone and the dogs were gone, raccoons came in and killed half the chickens. No one had ever seen any until we took the dogs. This is in the city. Our male dogs who mark the yard constantly had been keeping them away. They were killed at 4 am our neighbor said. The dogs are in the house at night. The marking tells the predators that they are present on the property. I had not realized that at all. I learned the hard way that no matter where you live or how well you think you made things safe, there are always weaknesses in the system you did not realize. It is like hitchcock ....the wild animals are watching us to wait for a time when they can kill our beloved livestock. The crow incident was right out of a horror movie. The crows showed up. There were two that every evening flew to the house and watched us. It was really wierd and began happening when we first let out the ducklings to forage. I did not piece it all together until it was too late. We were gone for 4 hours and found them all dead but untouched with marks. You could tell they were bombarded from the sky. After that kill, all the crows disappeared and never were on the property again. The yard was silent. I had found the crows right around the coop on the ground several times. They had to be scared away both times but my adult chickens didn't seem to be scared so I discounted the danger. According to research I did after the fact, they were waiting on the baby geese and ducklings. They had just been allowed to forage openly that week. Perhaps there is a good reason for crows to be called a murder of crows. They dive at the ducklings...kill then...then come back later after they are ripe and more easily torn apart. There was not a mark on any of them. They were killed in every direction of the yard. It was horrible. It certainly was a bummer on Mothers day to say the least. Just so you know, crows will kill baby duckling and geese. Hawks are not the only killers.