Vicia sativa, also known as common vetch or spring vetch, is a type of legume plant that is sometimes used as a forage crop for livestock, including rabbits. It can be a good source of protein and other nutrients for rabbits, and many rabbits enjoy eating it.

However, it's important to feed vetch to rabbits in moderation, as it contains high levels of protein and can cause digestive problems if fed in excess. Additionally, rabbits should have a balanced diet that includes a variety of fresh hay, vegetables, and a small amount of pellets.

Before feeding vetch or any other new food to your rabbit, it's a good idea to consult with a veterinarian or a rabbit nutrition expert to ensure that it's safe and appropriate for your rabbit's specific dietary needs.