Quoting speaktruth2powr:" Is there a reason you haven't given her anything else to drink other then a little water and 4 oz of formula in the last several hours? I would say yes, she sounds severely dehydrated."
DD hadn't made a wet diaper in nearly 24 hours, and was not dehydrated when we went into the ER. It takes a few days for them to become severely dehydrated. If her soft spot isn't sunken and the other signs I mentioned, she isn't dehydrated yet. But if you continue to not give her bottles, she will be.