I checked her Crop yesterday morning and it was empty, not full at least.
she took a good 30 seconds to come out the coop and was still slightly listless, in comparison to the other two, but today she seems to be recovering - She whizzed out the coop this morning and is happily foraging with the other two hens. so I'm hoping she's feeling a lot better - We'll see over the next few days if she's made a full recovery..
ALSO, I think she may have just laid us her first egg! I wont confirm that though, lol