Maybe you can mail yourself a some Nutri-Cal, like tomorrow.
That way you will have it.
Try her now on baby food meats. If she likes those then just take some. Also take a qt. size freezer zip-loc and after the meat has been opened, just get some ice from the attendant, put it in the bag with the jar of meat.
What ever carrier you decide on, make sure it's airline approved. Good luck on your trip.
