Rabbit Diet 80-10-10: Hay, Pellets, and Greens Done Right

Quick answer

Master the golden rule of rabbit nutrition with our comprehensive guide to the 8

A healthy adult rabbit's diet should consist of 80% high-quality grass hay, 10% fresh leafy greens, and 10% high-quality pellets and healthy treats. Providing unlimited hay is the single most important thing you can do to keep your rabbit's digestive system moving and wear down their continuously growing teeth.

Why it matters

Rabbits have highly specialized, sensitive digestive systems that evolved to process large amounts of low-nutrient, high-fiber vegetation. Unlike dogs or cats, rabbits are hindgut fermenters. This means they rely on a complex ecosystem of beneficial bacteria in their cecum (a large pouch at the junction of the small and large intestines) to break down tough plant fibers.

Without a constant, heavy flow of long-strand fiber from grass hay, a rabbit's gut can slow down or stop entirely. This life-threatening condition is known as gastrointestinal stasis, or GI stasis.

:::video{src="https://storage.googleapis.com/decennium-global.appspot.com/knowledge_assets/care_guides/rabbit-diet-80-10-10-hay-pellets-and-greens-done-right/inline-1-1779985226073.mp4" poster="https://storage.googleapis.com/decennium-global.appspot.com/knowledge_assets/care_guides/rabbit-diet-80-10-10-hay-pellets-and-greens-done-right/inline-1-still-1779985121384.png" alt="Close-up of a rabbit chewing hay to show dental wear"}
The continuous lateral grinding motion of chewing grass hay is essential for keeping a rabbit's teeth worn down to a safe length.
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Furthermore, a rabbit's teeth grow continuously throughout their life—up to 12 centimeters per year. The physical act of chewing coarse grass hay grinds their upper and lower teeth against each other, preventing painful dental spurs that can cut into their tongue and cheeks, leading to infections and an inability to eat.

:::key-facts

• Rabbits are hindgut fermenters requiring constant fiber to prevent GI stasis.
• Rabbit teeth grow continuously and must be worn down by chewing coarse grass hay.
• Cecotropes are special nutrient-rich droppings that rabbits must re-ingest directly for vital vitamins.
• Pellets should never be fed in unlimited quantities to adult rabbits.
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Another unique aspect of rabbit physiology is the production of cecotropes. These are small, soft, shiny droppings that resemble tiny bunches of grapes. They are packed with essential vitamins, proteins, and beneficial bacteria. Rabbits eat these directly from their bottom to absorb these nutrients on a second pass through the digestive tract. A diet too rich in sugars or pellets will disrupt this delicate balance, causing your rabbit to produce excess cecotropes that they leave uneaten, leading to a messy bottom and nutritional deficiencies.

:::ask-boo
What are cecotropes and why does my rabbit eat them?
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What good looks like

To keep your rabbit's digestive tract and teeth in perfect working order, you must strictly adhere to the 80-10-10 rule. Let's break down exactly what each portion of this nutritional pyramid looks like in practice.

80% Grass Hay: The Foundation

Hay is not bedding; it is the absolute core of your rabbit's life. Your rabbit must have access to a pile of fresh, clean grass hay that is at least the size of their own body at all times.

• Timothy Hay: The gold standard for adult rabbits. It is high in fiber and relatively low in calcium and protein.
• Orchard Grass & Meadow Hay: Excellent alternatives or mixers to keep your rabbit interested and mimic a natural foraging experience.
• Oat Hay: A thicker, crunchy hay that is great for dental wear, though it can be slightly higher in sugar.
• Alfalfa Hay (The Exception): Alfalfa is a legume, not a grass. It is far too high in calcium and protein for healthy adult rabbits and can cause kidney stones and obesity. It should only be fed to growing kits under six months of age, or pregnant/lactating mothers.

10% Fresh Leafy Greens: The Vitamin Boost

Fresh greens provide essential hydration, vitamins, and minerals. Introduce these only after your rabbit is six months old, and always do so gradually. A good rule of thumb is to offer 1 to 2 packed cups of leafy greens per 2 kilograms of body weight daily.

• Daily Staples (Low Calcium): Romaine lettuce (never iceberg), red and green leaf lettuce, cilantro, parsley, basil, mint, and dill.
• Occasional Treats (High Calcium/Oxalates): Kale, spinach, dandelion greens, Swiss chard, and beet greens. Rotate these to prevent calcium buildup in the bladder.

A visual representation of the 80-10-10 rule: unlimited hay should dwarf the small daily portions of fresh greens and pellets.

10% Pellets and Healthy Extras: The Concentrated Nutrient Source

Pellets should be viewed as a vitamin supplement, not the main meal. Many new owners make the mistake of filling a large bowl with pellets and leaving it out all day. This leads to obesity, dental disease, and gut issues.

• The Portion: Feed no more than 1/4 cup of high-quality pellets per 2.5 kilograms of body weight per day. For smaller rabbits, this might just be a tablespoon or two.
• The Quality: Choose plain, uniform green pellets. Avoid "muesli" mixes that contain colorful seeds, nuts, corn, or dried fruit. Rabbits will selectively eat the fatty, sugary bits and leave the healthy parts behind.
• Treats: Keep fruit (like apple slices or berries) and high-sugar vegetables (like carrots) to an absolute minimum—no more than one teaspoon per day. Carrots are not staple foods for rabbits, despite popular cartoon depictions!

:::pro-tip
Use your rabbit's daily pellet ration as training treats. This prevents overfeeding while building a strong bond with your pet through positive reinforcement.
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:::ask-boo
How many pellets should I feed a 2kg rabbit daily?
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Step-by-step

Transitioning your rabbit to a balanced 80-10-10 diet requires patience and careful monitoring. Rapid dietary changes can shock their sensitive gut flora, leading to fatal digestive upset.

Step 1: Establish Unlimited Hay

Ensure your rabbit has multiple hay stations. Place hay near their litter box, as rabbits love to eat hay while using the bathroom. If your rabbit is a picky eater, try mixing different cuts of Timothy hay or blending in some fragrant orchard grass.

Step 2: Calculate and Restrict Pellets

Weigh your rabbit to determine their exact weight. Calculate their daily pellet allowance based on the rule of 1/4 cup per 2.5 kilograms. Measure this amount out in the morning and do not refill the bowl once it is empty.

Healthy droppings (left) are large and fibrous, while small, dark, or misshapen droppings (right) signal a lack of fiber or early gut slowdown.

Step 3: Introduce Greens One by One

If your rabbit is not used to fresh greens, start with a small piece of a mild herb like cilantro or parsley. Wait 24 to 48 hours to monitor their stool. If their droppings remain large, round, and dry, you can gradually increase the portion and introduce another green.

Step 4: Monitor the "Poop Test"

Check your rabbit's litter box daily. Healthy rabbit droppings should be large, round, uniform, and light brown (resembling compressed sawdust). If you notice small, dark, hard, or misshapen droppings, or if they are strung together with hair, your rabbit needs more fiber and water immediately.

Step 5: Eliminate Sugary Treats

Phase out commercial yogurt drops, seed bars, and excessive fruit. Replace them with healthy, high-fiber chew toys like apple wood sticks, willow balls, or cardboard tubes stuffed with hay.

:::ask-boo
What greens are safe to feed my rabbit daily?
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Signs something's wrong

Because rabbits are prey animals, they are masters at hiding pain and illness. You must pay close attention to subtle changes in their eating habits and waste production.

• Decreased Appetite: Refusing favorite treats or ignoring fresh hay is a major red flag.
• Changes in Droppings: Small, hard, or completely absent droppings indicate a slowing digestive tract.
• Uneaten Cecotropes: Finding soft, smelly, grape-like droppings smeared on the floor or stuck to your rabbit's fur indicates their diet is too rich in sugar or protein.
• Lethargy and Hunching: A rabbit sitting hunched in a corner, squinting their eyes, and refusing to move is in pain.
• Loud Stomach Noises or Complete Silence: A healthy gut makes soft, gurgling sounds. Extremely loud, gassy gurgling or a completely silent abdomen are signs of trouble.
• Drooling or Wet Chin: This is a classic sign of dental pain or overgrown teeth (dental spurs) preventing them from swallowing properly.

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Consuming cecotropes directly from the source is a completely normal and vital part of a rabbit's digestive health.
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:::warning
If your rabbit stops eating, drinking, or passing feces for 12 hours or more, they are in a medical emergency. GI stasis can become fatal very quickly. Take your rabbit to an emergency rabbit-savvy vet immediately.
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When to call your vet

You should contact a rabbit-savvy veterinarian if you notice any of the following:

• Your rabbit has not eaten or pooped in 12 hours.
• Your rabbit is grinding their teeth loudly (a sign of severe pain, distinct from the soft "purring" click of a happy rabbit).
• There is mucus or watery diarrhea in the litter box (true diarrhea is rare in adult rabbits and is rapidly fatal).
• Your rabbit's abdomen feels tight, swollen, or hard to the touch (bloat).
• You notice drool on their chin or they drop food out of their mouth while trying to chew.

Common mistakes

Avoid these frequent pitfalls to keep your rabbit safe and healthy:

• Feeding Muesli Mixes: These colorful commercial diets encourage selective feeding, leading to severe nutritional deficiencies and dental disease.
• Overfeeding Alfalfa: Feeding alfalfa hay to adult rabbits leads to obesity and painful bladder sludge or stones due to excess calcium.
• Using Iceberg Lettuce: Iceberg lettuce contains lactucarium, which can be harmful to rabbits, and consists mostly of water with zero nutritional value.
• Treating Carrots as a Staple: Carrots are incredibly high in sugar and should only be given as a tiny, occasional treat.
• Sudden Diet Changes: Switching pellet brands or introducing a massive plate of new greens overnight can disrupt the cecal microflora and trigger GI stasis.

Quick FAQs

Can my rabbit live on pellets alone?

No. Pellets lack the long-strand fiber required to keep the gut moving and do not provide enough physical wear for their teeth. A pellet-only diet will quickly lead to obesity, dental disease, and fatal GI stasis.

My rabbit won't eat hay. What should I do?

First, rule out dental pain with a vet visit. If they are healthy, gradually reduce their daily pellet portion to encourage hunger for hay. Try different brands, cuts (first cut is crunchier, second cut is softer), or switch to fragrant orchard grass to entice them.

Is it safe to feed wild grass from my garden?

Only if you are 100% certain the area has not been treated with pesticides, fertilizers, or herbicides, and has not been visited by wild rabbits, dogs, or cats (which can transmit deadly viruses like RHDV2 or parasites).

How much water does a rabbit need?

Your rabbit should always have access to fresh, clean water. Heavy ceramic bowls are preferred over bottles, as drinking from a bowl is more natural and encourages higher water intake, which is vital for preventing bladder sludge.