It's probably not a bad idea to know all of what you can with anatomy, especially if you have any interest in it. [He... doesn't, really, to be fair. But it's still a useful topic none-the-less.]

Nnnnot typically. To my knowledge they're usually herbivores unless they're the kind that eat, like, dung or something. [Does that count? Eh, not really.]

There's all kinds of insects and such that eat pumpkins. It's just a vegetable, after all. Just leave them around long enough and I'm sure it'll attract rats and probably once it starts rotting it'd attract things like maggots and flies?