Cows milk is not good for squirrels. Can you get goats milk? Here is the recipe for homemade goats milk formula.
https://thesquirrelboard.com/forums/...ilk-Formula***
Try offering some slightly sweetened water in between feedings. She might be dehydrated. Sometimes warm bath soaks and gentle massages of her abdomen in a downward motion during the bath can help get things moving. Don’t let her get chilled after the bath.
You should really try to get her switched to the goats milk formula instead of the cows milk. Ideally, if you can get Fox Valley 20/50 squirrel formula from the internet sent to you there, that is the formula that she should be on as the goats milk formula is only supposed to be a temporary formula.