Chicken killed during the day

[Chicken Girl1]

Arrggh! Came home from church today to find one of my hens killed

. The rest of the flock were huddled together in a corner, the hen's insides were eaten but that's about all. I've had snakes, raccoons, hawks, and an unknown predator. What do you think was most likely predator to come in the day time? I can't find any signs of how it got in, unless it was a hawk, because they were in their "uncovered" pen today. Really bummed since I recently built a new secure covered run but didn't put them in yet.

 

[GC-Raptor]

A hawk, that's what attacked mine a few days ago. I was home and heard a commotion and saw four of my five girls huddled together. So I went out and saw feathers and looked up and saw a Coopers hawk in a tree and he flew off. I only saw 4 girls and lots of feathers, so I walked around looking for her but found nothing. Well I found her in the coop shaking, but unhurt minus a few feathers. She took the next day off but was back to laying yesterday.

GC

 

[DuckMD]

A hawk attacked my grown ducks yesterday. I was standing 20 feet away at the time. Needless to say they are both spooked and locked up today.
Open to any deterrent suggestions. 12 gauge is not an option here.

 

[Chicken Girl1]

A hawk attacked my grown ducks yesterday. I was standing 20 feet away at the time. Needless to say they are both spooked and locked up today.
Open to any deterrent suggestions. 12 gauge is not an option here.

I know some people string fishing line across the top of their run (if it isn't covered already).

 

[DuckMD]

Chicken Girl 1,
You've given me a hopeful task for today. I'll try the line.
Thank you.