Where does the meat for the burgers and hot dogs come from in the universe? Are there space cows? Are there different kinds of meat?

There are different kinds of meat. A lot of the cheaper stuff, you'll see synthetically grown meat, still technically meat. And for some of it, there is actual livestock still being raised. We have land, and grain is not so much of an issue anymore. It is a little more luxury, because you have to fly it around and ship it and all that cost involved. But we do have space, literally whole planets, to do this stuff on. So yeah, it comes from a variety of sources. And you'll see in some of the descriptions, some things are just protein, which gives you the nutrients you need, but it's not trying to simulate any kind of flesh-eating experience.

Is Whammer's real meat or is it synthetic?

Whammer's is synthetic. It's beef, but it's not from an animal.