Hi all... This is my first year with chickens. We have 4...one of which is a silke. We live in KY in the city, roosters aren't allowed. I have always known birds of prey were a threat but had our first run in last night, first incident all year. All chickens are safe, barely. I didn't get a good look at the bird it all happened so fast. We live in a heavily shaded/covered yard,our chickens free range all day. It was just about dusk. Our silke who isn't 100% part of the flock due to being introduced later, was wandering around alone like she does... She was under our big apple tree in corner of yard. All of a sudden a huge bird came from nowhere, attempted to grab her but didn't get a good grip. She is pretty fast. I started running towards the action, the bird tried again and finally flew off. My immediate concern was our silke(Muppet) who was fine, just scared... I didn't see where the bird flew off to. I'm curious if it was an owl or hawk. I'm leaning towards an owl due to the attack style.... It seemed more ambush versus a swoop, and there was tree cover. It was also nearly dark. I know hawks are starting to migrate South as well. Only good look I got was from behind. The bird seemed mostly white or light gray with black tipped feathers. Wish I had a better angle to of seen the face. Any advice on prevention besides not letting them free range? Is daytime safer than dusk? If an owl, it seems like it may be an ongoing issue versus a hawk vacationing in the area for a few weeks.