You're doing what you can for her.I’ve got the lamp 2.5-3 feet away from her. It’s probably 50 degrees out in the garage where she is so I don’t think it’s too hot. She did feel kinda warm, which I’m hoping is a normal warm. She’s made it another night, I’ve got her to sip some water and a milk/banana/peanut butter shake. I just hope she’s not too miserable and in pain, I don’t want her suffering. From what I’ve read chickens don’t show much emotion when in pain. Never thought I’d be torn up over chickens, I won’t be letting them out of the run anytime soon after this.
Keep trying to get fluids into her.
You don't mention your location, but if you are in the US, it would be a good idea to get come antibiotics for her when stores open tomorrow. Tractor Supply carries Procaine Penicillin G. Dosage is 1/4ml injected into the breast muscle 1/4" deep, give for 5 days, alternate sides daily. Use a 20 gauge needle and a syringe - TSC carries those too.
If you have any other antibiotics on hand, we may be able to use those, just tell us what they are and can try to figure the dosage for you.