Your rabbit needs hay available all day long because a rabbit's body is built to graze almost constantly. Hay should make up the large majority of what your rabbit eats, and a full rack or pile within easy reach at all times keeps both the teeth and the digestive system working the way they are designed to.
Two systems that never stop growing or moving
A rabbit's teeth grow continuously throughout life, and the long, side-to-side chewing motion needed to break down coarse hay strands is what grinds those teeth down evenly. Without enough chewing, teeth can overgrow, develop sharp points, and make eating painful. At the same time, a rabbit's gut is a fermentation system that relies on a steady flow of fiber to keep food moving. When fiber intake drops, gut movement slows, appetite falls, and a rabbit can become unwell surprisingly fast. Unlimited hay supports both systems in a way no pellet or treat can replace.
Choosing and serving hay well
Grass hays are the right foundation for adult rabbits. Timothy hay is the most widely used staple, and orchard grass is a softer, sweeter-smelling option that many picky rabbits and allergy-prone owners prefer. Oat hay adds variety and encourages foraging. Alfalfa hay is richer in calcium and protein, so it is generally reserved for young, pregnant, or nursing rabbits rather than healthy adults, unless your veterinarian advises otherwise.
Good hay should smell fresh and sweet, feel dry rather than dusty, and show a mix of green and pale strands. Store it in a breathable container away from damp, and avoid plastic-sealed storage in a humid room, which can encourage mold. Offer hay in more than one place: a rack by the litter box works beautifully because rabbits like to graze while they toilet, and a loose pile in a cardboard box gives them something to dig through and rearrange.
How much, and how often to top up
A useful rule of thumb is that a rabbit should eat roughly its own body size in hay every day. Most rabbits will not overeat grass hay, so there is no need to ration it. Top the hay up at least once or twice a day, even if some remains, because the fresh, fragrant layer on top is what tempts a rabbit to keep eating. Pull out any hay that has been urinated on or trampled into bedding, and shake out dust before serving. If your rabbit suddenly leaves its hay untouched, treat that as information worth acting on, not a quirk to wait out.
When low hay intake is a warning sign
A rabbit that stops eating hay, produces noticeably smaller or fewer droppings, or becomes quiet and hunched needs prompt veterinary attention. Dental pain, gut slowdown, and other problems can sit behind a picky phase, and rabbits hide illness well. Never try to wait out a full day of not eating; contact your vet or an emergency clinic for guidance the same day. Keeping hay front and center makes these changes easier to spot early, because a full rack that stays full is a clear signal.
Making sure the rack is never empty
In a busy household, hay top-ups are exactly the kind of small task that everyone assumes someone else did. KinsLe's Care Teams let you assign feeding duties — including morning and evening hay checks — to specific family members, and each completed task is marked with a timestamp. That way you can see at a glance that the rack was filled, rather than discovering an empty one at bedtime. Set up the routine once, and your rabbit's most important food never depends on memory alone. Care Teams holds the morning and evening hay schedule together on KinsLe because each top-up is assigned to a specific household member by name and marked done with a timestamp when fresh hay goes into the rack.