Foxes vs Rabbits
Where the wild beasties are
In Foxes vs Rabbits your animals live and develop within the ecosystem, improving their skills as they exist in it. Initially, only rabbits are available to players, which can be bought in the market, but a limited number. After that, the rabbits begin to multiply, which will allow them to be sold to other players. Next, Foxes with their modified gameplay will become available, followed by Bears. Thus, the in-game market works.