1- For as long as your doc tells you to.
2- When your doc tells you that you can start eating pureed food is when you can start.
3- Soup, V8, Protien shakes, Juices.
4- I like the atkins shakes and also a product from unjury, chocolate is my favorite flavor. Welcome to the UNJURY Homepage
5- I think how often you have to drink something varies by person.
Good luck with your surgery!!!