I hope the models are physically smaller (in terms of how many blocks they occupy) than the parents. Then, given the right amount of time to mature, you can basically have two cows that stand next to each other in a pit with a hole small enough for only offspring to fit into, and you can basically grow and grind the babies.
A little? I think they're way to big! It looks bad.
AKA Arctenik on some websites (or Zatnik, but I'm not the only Zatnik out there)
My texture pack on Planet Minecraft
Patch Notes, Ability to moderate your threads, Copper, Tin, Silver, Bronze, and Steel, Depth Increase, Layers in the ground of water/lava, Moar Forum Icons, Moar realistic ore veinsJust gotta watch out for PETA.