Yes, you can feed tree lucerne (also known as tagasaste or Chamaecytisus palmensis) to your rabbits. Tree lucerne is a leguminous plant that belongs to the same family as alfalfa. It is highly nutritious and can be a beneficial addition to a rabbit's diet.

Tree lucerne contains high levels of protein, vitamins, and minerals, making it a suitable forage option for rabbits. It is particularly rich in calcium, which is important for maintaining healthy bones and teeth in rabbits. The plant also has a good fiber content, promoting proper digestion.

When feeding tree lucerne to your rabbits, it is recommended to offer it in moderation and as part of a balanced diet. You can provide fresh tree lucerne branches or leaves, or alternatively, you can dry them and offer them as hay. Ensure that the tree lucerne is sourced from a clean and pesticide-free environment.

Introduce tree lucerne gradually into your rabbit's diet, alongside their regular hay and fresh vegetables. Monitor your rabbits' response to the new food and make sure they are tolerating it well. Remember that a rabbit's diet should primarily consist of hay, fresh vegetables, and a controlled portion of pellets.

If you have any concerns about the suitability of tree lucerne or any other specific food for your rabbits, it's always best to consult with a veterinarian who is knowledgeable about rabbit care. They can provide personalized advice based on your rabbits' individual needs and dietary requirements.