Wiseman, you need to put your scenario into mathematical terms, or write a simulation, or something. It’s too easy to imagine some foxes and rabbits breeding and scurrying about, and convince yourself that something is possible.
In any case the situation you described is not “group selection”, but good old-fashioned gene-level selection. In this case it’s selection for genes that lead to an optimal breeding rate.
Wiseman, you need to put your scenario into mathematical terms, or write a simulation, or something. It’s too easy to imagine some foxes and rabbits breeding and scurrying about, and convince yourself that something is possible. In any case the situation you described is not “group selection”, but good old-fashioned gene-level selection. In this case it’s selection for genes that lead to an optimal breeding rate.