OMG these are so cool! I cannot wait for the poses!
Now, I must ask-any significance to the specific animals chosen?

The poses are turning out so much better than these, ahhhhhh. Oh well.
OK. Rollo and Acca are wolves, because of Romulus and Remus - the classic myth of Rome's founding being by two twin boys raised by wolves (though Acca is a girl). Archelaus is a boar, because it was one of the animals used in the 'hunts' that were done in the coliseum. Claudius is a sheep, because it was a common animal to raise/eat, but not considered all that bright.

That is just AWESOME. DEEP THOUGHT MAKES EVERYTHING EVEN COOLER.