So basically, there will be four starters, one herbivore, on carnivore, on omnivore, and one streamivore. The kind of creature it is is determined by it's snout. Purr snout, short snout, cracker jaw, and digging trunk are all herbivore jaws. Omnivore Jaws are sticky tounge, bat head, and bird beak. Carnivore snouts are bearyena snout, saber tooth, posion fangs, and big nose. Streamivores have platypus and gills.
RULES
1.All the types will be seperated. (Herb-herb, Carn-Carn)
2. The types may not mate with any other type. (No Herbivore-Cranivore relationships)
3. The above rule may be broken for story purposes.
4. Herbivores cannot eat anything but berries, and can kill bearyenas, but they cant' pick up the meat. Carnivores eat meat, streamivores eat fish and such, and omnivores can eat both meat and berries.
5. You can have 1 species, for an isalnd, or you can have all on the same island. If you do all, you may only have one of each species to start. You may breed them until the thrid generation.
That's it for the rules. They may be added onto later, but for now, enjoy.