due to simulation ending as either all loin or rabbits die, modify simulation so it is able to add either loin or rabbit - to prolong the simulation.
while it's an artificial feature, believe it can illustrate various ecology concepts, e.g. adding a single rabbit in an environment populated with a lot of glass will lead to a rapid increase in the rabbit population, then a rapid decrease in the grass population, then rabbit population.
potential improvement / increase complexity / realism would be to code for chase & run away; see: https://www.youtube.com/watch?v=uQwHlfsqQRM
based on: http://www.slnova.org/GUTS/projects/21061/
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A converted version of the classic GUTS model