As far as i know Fritz Zyme does not include "food" it is just the nitrifying bacteria. In any case if using shrimp put that in first...then a day later put in your bottled bacteria.
Personally i find shrimp a pain and hard to control. I use ammonium chloride it serves the same purpose as shrimp, but can control ammonia precisely without some of issues you get using shrimp(again it goes in before bacteria).
I use this cause i start a lot of tanks and it lasts forever, but you can get small bottles of liquid for 3 or 4 dollars online.
Amazon product ASIN B00OTH5TAQ