All rabbits should have access to unlimited fresh grass and grass-based hay: Oat hay (most common), teff (Eragrostis), mountain hay, meadow hay, orchard grass & timothy hay. Give loads of fresh grass as it helps grind the teeth down.
Lucerne(alfalfa) is not a grass hay but rather a legume and should only be fed as a treat due to high calcium content. Lucerne can be fed in unlimited amounts to bunnies under 6 months and nursing does to help aid in bone development and hormone production, and as a treat thereafter.
Bunnies that fill up on pellets, do not eat enough hay ‒ check that your bunny is consuming at least its body size in hay per day before introducing pellets. Sometimes it is necessary to take pellets away completely to encourage hay eating ‒ your bunnies WILL beg for it, don’t give in!
They will learn to love their hay and will be happier & healthier for it. Do not mistake straw for hay. Although rabbits may eat straw, it has no nutritional value. An average rabbit’s diet should consist of unlimited hay and grass, 1-2 cups safe veggies/greens, 1 egg cup quality, non-muesli pellets, tsp. of occasional fruit/treats.