How much water do I need to force in my sick chicken?

[Henfla]

One of my chickens have become ill with white watery diarrhea. We have seen a vet today and started antibiotics. It may be salmonella, but we don't know until in 3 days.
I have her inside and she is lethargic. She stands and sleeps for the most time. She doesn't want to drink anything, so the vet showed me how to give her 5 ml with a syringe. She has now gotten 10 ml water. She eats a bit, so I gave her some yoghurt with a bit water with vitamins and with mealworms, and she had some bites. She also just ate a well of her regular feed. The vet said she isn't dehydrated yet.
How much water do I need to give her for her to stay hydrated? Her weight is 1,1 kilograms (I guess that's 2,42 pounds?)
This is her poop:

And this is her:

 

[Eggcessive]

How old is she? Does she lay eggs? Is her crop emptying overnight, and what does it feel like now? Do you know how much she weighs? A kitchen scale is an easy way to find out. You could get a rough weigh pt by weighing yourself while hoding her, then subtract your current weight. I would aim for 15 ml (half and ounce) of water per pound of weight every 6-8 hours each day.

 

[Henfla]

How old is she? Does she lay eggs? Is her crop emptying overnight, and what does it feel like now? Do you know how much she weighs? A kitchen scale is an easy way to find out. You could get a rough weigh pt by weighing yourself while hoding her, then subtract your current weight. I would aim for 15 ml (half and ounce) of water per pound of weight every 6-8 hours each day.

She is 17 weeks. Her crop empties overnight yes. Now it has grown a bit in size after I got her to eat, but it's not as big as it normally is before they go to bed. I wrote that she weighs 1.1 kilograms.