Regardless of observing biblical kosher Torah laws relating to food, it is always safer to have an extra legal protection of your food.
A respected kosher certification agency checks the source of absolutely EVERY ingredient, including flavoring, coloring and preservatives.
The biggest kosher certifying agencies, with rabbis working around the world,
are Orthodox Union (letter U in a circle),
Kof K (a backwards letter c כ ), and Star K, letter K inside a star.
Here's just one example of non-kosher meat recall:
http://www.reuters.com/article/us-usa-hotdogs-idUSKBN1A00PM?feedType=RSS&feedName=topNews