We lost several to stray dogs that a lady kept taking in. She didn't contain them though and they ran loose wreaking havoc around here. I live in the country but the street I live on is lined in houses. A little community, just one street. After we threatened to make them pay for our chickens they found homes for the dogs. I guess anyway. There was a man a couple houses up from them that kept loosing his flock to the dogs also. He said he was going to start shooting if they didn't do something. Three of our 4 dogs run free but they dont bother chickens. They actually lay with them in the yard. Drink out of the same bucket.
Anyway, the dogs left a trail of feathers is how we found out who the culprits where. A hawk was about to get one of our chickens once and it scared a squirrel when it came after the hen and startled the hawk and it left empty handed.