lost 3 hens

[Wyorp Rock]

Any chance they ate something rotten like a dead animal or the maggots off of a dead carcass or ingested something toxic like fertilizer, weed killer, etc?
Check your feed to see if any of it may have gotten moldy or rancid in the heat - this can happen quickly.

Their crops - are they empty by morning?

Your heat index is pretty high - I know you are doing all you can - the worst one, see if you can get some water or electrolytes into her. I'm very sorry for your loss. I hope this one recovers, but if you do lose her, sending her for testing would be a good idea so you can get some answers.
Please keep us posted.

 

[The Phantom]

Ok. That is what I gave my hens when they were looking bad

 

[ChickNanny13]

CTP (curly toe paralysis) causes toes to curl & lameness is a Vitamin deficiency, Riboflavin as Eggcessive stated or Mareks. Vitamin B Complex, PolyVisol without iron & a riboflavin rich diet helps alot. Spinach, beef liver, hamburger, mushrooms, salmon, tuna, plain yogurt. I used boiled egg yolk mixed it with the feed, separated from the rest, some use the "sling". Check out the website "poultry podiatry".

 

[Kiki]

CTP (curly toe paralysis) causes toes to curl & lameness is a Vitamin deficiency, Riboflavin as Eggcessive stated or Mareks. Vitamin B Complex, PolyVisol without iron & a riboflavin rich diet helps alot. Spinach, beef liver, hamburger, mushrooms, salmon, tuna, plain yogurt. I used boiled egg yolk mixed it with the feed, separated from the rest, some use the "sling". Check out the website "poultry podiatry".

https://sites.google.com/a/poultrypedia.com/poultrypedia/poultry-podiatry