Chicken was attacked by canine, what to do next?

[Wyorp Rock]

That is great advice about checking her crop...I did that last night and found hers was a bit smaller than the others, and our next biggest girl is bullying her badly now, chasing her away from the food and water. I isolated her back in the sun porch, but now the other one, Venus, is also attacking ME when I go in to check on Chickpea! I am tempted to just isolate Venus the bully instead, but I'm letting Chickpea have some time to herself to eat and drink in peace for today. They are going nuts being cooped up these past 2 weeks! I know that's not helping the aggression, but I don't know what to do.

Are you able to let them out for a short while during the day?
Being cooped up will stress them for sure, so giving them some time out may help.
I would normally suggest adding another feed station, but do you have room? It's normal for higher ranking bird to chase off the lower birds from food. It's good that you are observing and making some changes where needed.
How is Venus attacking you? This is a hen?

 

[Mountain_artist]

Are you able to let them out for a short while during the day?
Being cooped up will stress them for sure, so giving them some time out may help.
I would normally suggest adding another feed station, but do you have room? It's normal for higher ranking bird to chase off the lower birds from food. It's good that you are observing and making some changes where needed.
How is Venus attacking you? This is a hen?

We do already have two feeding stations, but they are right next to each other. I added separate food and water for Chickpea in the "sun porch." But it's a mess, and I can't fit under there to clean it up as well as I'd like.

Venus is the next-biggest hen, and she actually runs up to me and pecks at my legs, or butt if I'm kneeling down! She also squawks at me and flaps her wings! When I push her away or "peck" her back, she comes back harder! I picked her up and carried her around, petting her and cooing at her, just in the hopes of showing her I'm bigger but I'm nice (I'm no chicken psychologist! lol!)
I'm so afraid to let them out. There is thick woods all around our little yard, and they love to go in and scratch up the leaves. I am 100% positive coyotes are nearby and hungry. The weather here is also terrible at the moment. It's just the worst time of year to be dealing with all this, and I feel like there's no great solution. I just want my sweet hens back!

 

[Eleanor C]

When she is integrated back into her flock make sure you bandage her and try to put a cape on her so the chickens don't peck at her wounds.

 

[Wyorp Rock]

We do already have two feeding stations, but they are right next to each other. I added separate food and water for Chickpea in the "sun porch." But it's a mess, and I can't fit under there to clean it up as well as I'd like.

Venus is the next-biggest hen, and she actually runs up to me and pecks at my legs, or butt if I'm kneeling down! She also squawks at me and flaps her wings! When I push her away or "peck" her back, she comes back harder! I picked her up and carried her around, petting her and cooing at her, just in the hopes of showing her I'm bigger but I'm nice (I'm no chicken psychologist! lol!)
I'm so afraid to let them out. There is thick woods all around our little yard, and they love to go in and scratch up the leaves. I am 100% positive coyotes are nearby and hungry. The weather here is also terrible at the moment. It's just the worst time of year to be dealing with all this, and I feel like there's no great solution. I just want my sweet hens back!

Well, the weather will eventually get better, yes, it's turning cold for a few days!
I understand about keeping them penned with predators lurking. I keep mine enclosed too. If you plan on keeping them this way, think about expanding your run to give them more space.
As for Venus, some hens do peck. I don't hand feed, so this discourages some of that bossy behavior, but I still have 1-2 on occasion that like to peck the back of the leg. I usually ignore it LOL