Animal surprises and anal pouches

[Deleted]

So I've recently become a guinea pig owner in addition to the rest of the zoo, and in my surprisement I found out that these buggers are coprophagous animals and on top of that have an anal sack where they keep a pellet of poop in case of munchies. I was blown away, and I now consider these beings as my superiors.

[Dundebuns]

Some creatures do not digest all the nutrients from their food on the first go, and hence eat their poo. Rabbits are a prominent example.