What should baby eat: hot dogs
I saw a video once of what happened when someone left a hot dog out on the counter. There were no extreme conditions like cold or heat or humidity. Nothing happened. The hot dog never went bad.
It's said that if food can go bad, it's good for you (ie veggies, fruits, beans, breads, etc). And if it cannot, it's not good for you (ie candy, soda, etc.)
The same was also done with a McDonalds hamburger and fries. They never went bad. The bread got hard but never molded. The fries got hard but remained as fries.
So.. preservatives. They just aren't good for us at any age. I know some people like to freeze hot dogs and give them to babies to teeth on, but frozen fruit is a better option.