What to Feed a Rabbit: Hay, Pellets, and Safe Greens

Author: Elliott Garber, DVM

A healthy rabbit diet is mostly grass. Give your rabbit unlimited fresh grass hay as the foundation, roughly 80 to 85 percent of what it eats, add a small measured portion of plain high-fiber pellets, offer a daily handful of washed leafy greens, and keep clean water available at all times. Everything about a rabbit’s body, from its continuously growing teeth to its constantly moving gut, is built to process large amounts of fiber, so the single most important thing you can do is keep good hay in front of it every hour of the day.

Hay is the foundation, not a side dish

If you remember one thing, remember this: hay is the meal, and everything else is a supplement. The House Rabbit Society recommends that grass hay make up around 85 percent of an adult rabbit’s diet, offered free-choice and refreshed so there is always a clean, fragrant pile available.

Hay does two jobs that nothing else can. First, it keeps the gut moving. A rabbit’s digestive tract relies on a steady stream of fiber to keep contents flowing, and the Merck (MSD) Veterinary Manual notes that a generous amount of indigestible fiber is needed to promote intestinal motility and to minimize intestinal disease. When fiber drops, motility slows, and a slowed or stalled gut is the beginning of GI stasis, one of the most common life-threatening emergencies in pet rabbits.

Second, chewing hay wears down teeth. A rabbit’s teeth grow continuously throughout its life. The long, side-to-side grinding motion required to break down coarse grass is what keeps the molars filed to the right length and shape. Feed soft food and skip the hay, and the teeth are never worn evenly, which leads to overgrowth and sharp points called spurs that can cut the tongue and cheek. This is why a hay-poor diet is one of the leading causes of the painful dental disease covered in our rabbit nail and dental care guide.

Good adult hays are grass hays: timothy, orchard grass, oat hay, and meadow hay. Buy it green and sweet-smelling, store it somewhere dry and airy, and skip any bale that looks brown, dusty, or musty. Rabbits are picky, and a fresh, aromatic hay is one you will actually see them eat.

Pellets: small, plain, and measured

Pellets are a concentrated supplement, not the main course. They exist to top up nutrients that hay and greens alone might not fully cover, and the mistake most new owners make is offering too many. A bowl of pellets left out all day fills a rabbit up so it eats less hay, and that is exactly the wrong tradeoff.

Choose a plain, uniform, high-fiber pellet. The House Rabbit Society suggests a timothy-based pellet with a minimum of around 18 percent fiber for adults. Feed a small measured portion sized to your rabbit’s weight rather than a topped-off bowl, and ask your rabbit-savvy veterinarian for an amount appropriate to your individual animal, since it depends on size, age, body condition, and how much hay and greens it eats.

Avoid anything with the extras. Pellets studded with dried fruit, seeds, nuts, corn, or colorful bits are not treats, they are a problem. Which brings us to the single worst thing in the rabbit food aisle.

Skip muesli-style mixes entirely

Muesli mixes, those colorful blends of flaked corn, peas, seeds, and pellets, look appealing to humans and are genuinely harmful to rabbits. Rabbits practice selective feeding: given a mix, they pick out the sugary, starchy pieces they like and leave the fibrous bits behind, so they end up eating a diet far lower in fiber than the label claims. A two-year study at the University of Edinburgh’s Royal (Dick) School of Veterinary Studies linked muesli-style diets to dental disease, reduced gut motility, obesity, and urinary problems. A plain pellet, where every piece is identical, removes the option to cherry-pick. Choose the plain pellet.

Fresh greens: a daily washed handful

A daily serving of fresh leafy greens adds variety, moisture, and micronutrients. The House Rabbit Society suggests offering at least three different types of leafy green each day and rotating what you serve. Introduce any new green slowly, a small amount at a time, and watch for soft stool over the next day or two before making it a regular.

Good everyday greens include romaine and other dark leaf lettuces, green and red leaf lettuce, cilantro, parsley, dill, mint, basil, bok choy, dandelion greens, carrot tops, endive, escarole, watercress, and turnip greens. A rough guide many rescues use is about one packed cup of greens per two pounds of body weight per day, but treat that as a starting point and adjust with your vet.

A few greens should be limited or rotated rather than fed in bulk. Kale and spinach are fine occasionally but are relatively high in calcium and oxalates, so they should not be the daily base. Because of the risk of Rabbit Hemorrhagic Disease Virus (RHDV2), the House Rabbit Society now recommends washing all greens thoroughly, swishing them in a bowl of water and changing the water a few times before serving. Always wash, and never feed greens that are wilted or slimy.

What to avoid, and why it matters

Some foods are low-value, and some are genuinely dangerous. Knowing the difference protects your rabbit’s gut, teeth, and waistline.

• Iceberg lettuce. Mostly water, almost no fiber or nutrition, and it can cause loose stool. Skip it entirely and use dark leafy lettuces instead.
• Sugary fruit as anything more than a rare treat. Banana, grapes, apple, and berries are treats, not food. The House Rabbit Society treats all fruit as an occasional item, a spoonful once or twice a week at most. Too much sugar disrupts the delicate balance of gut bacteria.
• Starchy and grain-based foods. Bread, crackers, cereal, pasta, oats, chips, and yogurt drops are all off the list. Rabbits are not built to digest starch, and it feeds the wrong bacteria in the gut.
• Muesli-style mixes. Covered above, and worth repeating: choose a plain pellet, not a colorful blend.

A diet low in fiber and high in starch and sugar is not just suboptimal, it is dangerous. It slows the gut and invites GI stasis, it lets teeth overgrow into painful dental disease, and it drives obesity that makes a rabbit unable to reach and eat its own cecotropes and unable to groom itself properly. These problems compound one another, which is why the fix is always the same: more hay, fewer pellets, plain food, and clean water.

Water, every day

Rabbits drink more than people expect, and dehydration is one of the fastest ways to tip a slow gut into full stasis. Keep clean, fresh water available at all times and refresh it daily. A heavy ceramic bowl is often emptied more readily than a sipper bottle, but either works as long as it is clean and never runs dry. In hot weather, water intake matters even more, which ties directly into our rabbit heat stress guide.

Babies, adults, and seniors have different needs

Diet changes with life stage, and the biggest difference is which hay you feed.

Young and growing rabbits need the extra protein and calcium in alfalfa hay to build bone and muscle. The House Rabbit Society reserves alfalfa hay and alfalfa-based pellets for babies, nursing mothers, and rabbits that are elderly, ill, or underweight. Young rabbits can have alfalfa free-choice along with unlimited grass hay while they are growing. For a full walkthrough of feeding milestones from weaning onward, see our baby rabbit care guide.

Adult rabbits, generally from around seven months of age, should transition off alfalfa and onto grass hay as the foundation, with a measured portion of timothy pellets and daily greens. The high calcium in alfalfa that helps a growing kit can contribute to bladder sludge and stones in an adult, so the switch matters.

Senior rabbits usually do well continuing on grass hay, but their needs vary. A thin or frail senior may benefit from richer food, sometimes including some alfalfa, while an overweight or arthritic senior may need adjustments in the other direction. Because seniors are more prone to dental and kidney issues, let your veterinarian guide any change based on body condition and bloodwork rather than guessing.

Keeping track of what works

Diet is where small changes show up as real health outcomes, so it helps to write things down. Weight is the clearest signal: a rabbit that is quietly gaining is usually getting too many pellets or too much fruit, and one that is losing may have a dental or gut problem brewing. Logging body condition, appetite, and stool over time turns vague impressions into a pattern you and your vet can act on. You can keep a running health and medical record on your rabbit’s Creatures profile, add a record after each weigh-in or vet visit, and set reminders for upcoming care like annual dental checks. If you have not set up a profile yet, here is how to add your animal.

When to call the vet

Rabbits hide illness well, so appetite is your early warning system. Call a rabbit-savvy or exotics veterinarian promptly if your rabbit stops eating, refuses its favorite foods, produces smaller or no droppings, sits hunched, grinds its teeth in pain, or drools. A rabbit that will not eat is a genuine emergency, not a wait-and-see situation, because its gut can shut down within hours. Do not attempt to force-feed or medicate at home without veterinary guidance. Get on the phone, describe what you are seeing, and let the vet direct the next step.

Frequently asked questions

How much hay should my rabbit eat each day?

As much as it wants. Hay should be available free-choice and never run out, and a healthy rabbit eats roughly its own body size in hay each day. If you are refilling the hay rack often, that is a good sign.

Can I feed only pellets to save time?

No. A pellet-only diet is low in the long fiber that wears teeth and keeps the gut moving, and it leads directly to dental disease, obesity, and GI stasis. Pellets are a small supplement to unlimited hay, not a replacement for it.

How do I switch my rabbit from alfalfa to grass hay?

Make the change gradually as your rabbit reaches adulthood, mixing in more grass hay over a week or two while reducing alfalfa, so the gut bacteria have time to adjust. Introduce a timothy-based pellet at the same time and ask your vet if you are unsure about timing.

Which vegetables are safest to start with?

Romaine and other dark leaf lettuces, cilantro, and parsley are gentle, well-tolerated starting greens. Introduce one at a time in small amounts, wash everything thoroughly, and watch the stool before adding the next.

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