I am so sorry!!
How long do you have to have it wired shut?
And can you ONLY eat through a straw?
I know juices aren't enough (hunger wise) but I would drink a lot of juices, along with milk. As far as blending things, I have no clue. I wouldn't want real food blended. You could put peanut butter in your shakes though. I used to eat peanut butter shakes a lot, they are yummy too and you get the nutrition from the peanut butter.