Rabbits are the only animal not able to reproduce in game, and I think that it would be really nice to see this implemented. Whether it's simply a one-to-one ratio with chances similar to with barn animals, or more in-depth. Maybe having, not an incubator, but a nest box for a rabbit - and if "pregnancy" is enabled for the rabbit, and the nest box is empty, the rabbit can give birth, and the kit stays in the nest box for an amount of time (like eggs in an incubator) before becoming a baby bunny. Maybe it's more: place rabbit in empty nest box, have baby rabbit at the end of [x] days? In that case, the rabbit would be out-of-action for the amount of time required. I would like to make rabbits a bit more relevant to some players who just view them as a "novelty" animal simply because they can't reproduce. I find them adorable and want others to find joy in their cute little snuffling noises.