Build this model

Set the stock and flows to:
RABBITS(t) = RABBITS(t - dt) + (CHANGE_IN_RABBITS) * dt
INIT RABBITS = 5
INFLOWS:
CHANGE_IN_RABBITS = RATE_CONSTANT*RABBITS
RATE_CONSTANT = .03
Graph the results.
What happens to the population?
Is this a realistic model?