here's a basic oultine of how the volution of each species would work, with each iteration enhancing the abilities of its predecessor, and gaining extra abilities. These iterations do need further research before finalisation, and I have yet to decide whether specialisation will be available (ie, a cat that specialises in, for example, stealth, may evolve into a panther, whereas a cat that specialises in speed may evolve into a cheetah). It is also not clear whether each final evolution will end up being an apex predator (have no major predators) or will still need to defend itself against such apex predators, but I would assume any such apex predator would be too overpowered to be a played character. I am considering adding extra iterations in between so that players find more variety in levelling up. Tasks at the highest trophic level to strengthen your pack will also be required to establish your place in the ecosystem.