Another sick chick- this is grieves me :(

So Im thinking that my buff Pullet is really sick and needs help here and now. She is lethargic, puffed up- droopy wings- not eating but is drinking. We had freezing temperatures the past few days and I had to go out and refill their water a few times, im wondering if she was getting enough, but Im concerned about coccidiosis- if I treat her I need to treat the whole flock right? Do I use medicated feed for that what do I do?

Im ready to run out and get meds for poor buff... can I save her at this point?

 

It's funny I was going to take a picture it looked really normal just green and white. Not running at all or bloody. I'm at Wilco right now trying to figure out where to find corid.

 

I have the safeguard already and they have lots of dust! The gal said the bacteria is just naturally occurring in the soil.

 

I asked the gal there where it was and she showed me but told me that this other stuff works better because it works for not only coccidiosis but other issues, too.
It's 2 tbsp per gallon and I've started treating all of them. I'm giving her electrolytes and vitamins too.


She survived the night which is better than what's happened with any of our other chicks in the past, but she is so so tired.

I found her sleeping in the basket we put her in last night and put her next to it on her feet to drink and eat some mash I made. She stood on her legs ate a little drank a little and promptly tucked her head under her wing and fell asleep on her feet.

I encouraged her to sink again and she did a little and was inclined to eat a tad more and drink a little then right back under that wing.
I put her back in the basket.

I haven't needed to tube hydrate her yet- if I take a dropper syringe and tilt her head back with the tip of her beak inside the end o the dropper- I can gently push in fluids and she drinks it down.
Her poop doesn't seem to have blood in it but I thought I might have seen some very very small pink tinged something (lining?) but it's mostly green and white.