To create a scenario in which all of the rabbits have brown fur, we would need to breed rabbits that are homozygous dominant for the brown fur trait. This means that both parents have two copies of the dominant allele for brown fur, and they will only pass on the dominant allele to their offspring. As a result, all of the offspring will inherit two copies of the dominant allele for brown fur, and they will all have brown fur. Alternatively, we could selectively breed rabbits that have brown fur, and only allow them to reproduce with other brown-furred rabbits. Over time, this would lead to a population of rabbits that all have brown fur.