Rabbits Breed & Eat Crops

The idea is simple enough. Unlike other animals, allow rabbits to periodically breed without player assistance. Additionally, make rabbits seek out and eat crops.

This would provide a little more challenge to farming, as dealing with pests is a huge part of the profession. If you wanted to go the extra mile, you could even allow the varmints to occasionally "burrow" under fences to get at those tasty veggies.

Keeping a faithful farm dog with the crops to chase off rabbits would be an easy way to protect your harvest.