Rabbit (Adult) Nutrition Guide

Practical, evidence-based feeding guide for adult rabbits: unlimited grass hay, limited pellets, safe greens, cecotrophy, GI stasis prevention and toxic plants.

Nutritional Snapshot

• Energy (maintenance): roughly 50 kcal/kg0.75/day (varies with activity, age, neuter status; see NRC/clinical guidelines)
• Diet composition (adult rabbit, dry-matter basis): Protein 12–16% (maintenance), Fat 1–5%, Crude fiber (indigestible/structural) 18–30% (high indigestible fiber is essential)
• Hay: unlimited grass hay (should be ~80% of daily intake by volume and the main source of fiber)
• Pellets: limited portion — typical adult guidance ~25–40 g pellets per kg body weight/day (see examples below); use a single, high-fiber rabbit pellet (no mixes)
• Fresh greens: daily, roughly 1–2 cups per 2 lbs (1 kg) body weight of mixed leafy greens
• Treats/fruit: rare and small — <5% of daily calories; fruit 1–2 teaspoons per 2–4 kg rabbit a few times/week
• Water: fresh, clean water ad libitum

Why nutrition matters for adult rabbits

Rabbits are hindgut fermenters adapted to a high-fiber, low-energy diet. Their gastrointestinal (GI) health, dental wear, body condition, and behavior are all tightly linked to diet. The goals of adult rabbit feeding are:

• Provide continuous indigestible fiber to maintain gut motility and normal cecal fermentation
• Prevent obesity by limiting calorie-dense foods
• Protect dental health through abrasive forage
• Support normal cecotrophy (reingestion of nutrient-rich night feces)

Key nutrient targets and rationale

• Energy: maintenance needs are most accurately estimated using metabolic weight (kg0.75). A commonly used reference point for adult rabbits is ~50 kcal/kg0.75/day for maintenance; active, intact or lactating animals require more. Use this as a starting point and adjust by monitoring body condition (NRC/clinical literature).
• Protein: 12–16% of diet (dry matter) for adult maintenance. Higher (16–18%+) is appropriate for growing, pregnant or lactating rabbits.
• Fat: 1–5% (keep fat low — high-fat diets change cecal fermentation and promote obesity).
• Fiber: high structural, indigestible fiber is essential — aim for crude fiber ~18–30% (and high neutral detergent fiber, NDF). Indigestible fiber promotes gut motility and healthy faecal production.
• Calcium and phosphorus: moderate — adult needs are met by good pellet formulations; excess calcium (common with alfalfa hay) can predispose to urinary sludge/stones in adults.
• Vitamins/minerals: most adult recipes are complete, no routine vitamin C needed (unlike guinea pigs). Do not supplement blindly; excesses (esp. fat-soluble vitamins, calcium) can harm.

The 80/20 rule: Hay as ~80% of the diet

• Unlimited grass hay (timothy, orchard, meadow) should be available 24/7 for adult rabbits. Hay provides the bulk, essential indigestible fiber, and the abrasive action needed for normal dental wear.
• Hay should make up roughly 80% (by volume) of a healthy adult rabbit’s daily intake. Do not use alfalfa hay routinely for adults — alfalfa is higher in protein and calcium and can contribute to obesity and urinary issues. Reserve alfalfa for growing, pregnant or lactating rabbits or as occasional treat.

• Best: timothy, orchard, meadow, brome
• Occasional: oat hay (lower calcium) or early-cut hays
• Avoid: dusty, moldy, or very stemmy hay that the rabbit rejects

Pellets: quality and amounts

• Choose a plain, high-fiber pellet made specifically for rabbits (no muesli or seed mixes). Pellet formulation should be labeled for rabbits with crude fiber ideally ≥18% and crude protein 12–16% for adult maintenance.
• Typical amounts for adult rabbits (general guidance — adjust by body condition):

• Reduce pellets for less active or overweight rabbits; consider pellet-free diets under veterinary guidance for obese rabbits.

Fresh vegetables and fruits (safe choices and amounts)

Leafy greens should be offered daily. Introduce new greens slowly and watch stool quality.

Safe leafy greens (feed a variety):

• Romaine, green leaf, red leaf lettuce (avoid iceberg)
• Kale, mustard greens, collards (in moderation — can be gas-forming)
• Arugula, dandelion greens, endive, escarole
• Parsley, cilantro, basil, mint
• Beet greens (in moderation)

Fruits and other treats:

• Fruit should be a rare treat because of sugar content. Limit to 1–2 teaspoons per 2–4 kg rabbit 2–3 times/week (e.g., a slice of banana or apple, small berries).
• Avoid sugary commercial treats and seed-based snacks.

Cecotrophy: what it is and why diet matters

Cecotrophy is the production and reingestion of special soft feces (cecotropes or night feces). Cecotrophy supplies essential B vitamins, amino acids and microbial protein produced in the cecum. Proper cecotrophy depends on:

• Adequate dietary fiber (especially fermentable fiber for cecal microbes)
• Stable cecal microflora (avoid sudden high-carbohydrate changes)
• Smooth gut motility

Preventing GI stasis through diet and management

GI stasis (slow or stopped intestinal motility) is a common, potentially life-threatening issue in rabbits. Diet is a major preventive factor:

• Provide unlimited indigestible fiber (hay) to promote continuous gut motility.
• Avoid sudden increases in sugars/carbohydrates (fruit, high-carbohydrate pellets/treats) that change cecal fermentation.
• Ensure adequate water intake — keep water bowls/bottles clean and in multiple locations if needed.
• Encourage exercise and foraging behavior (toys, space to run).
• Address dental problems promptly — pain from dental disease reduces eating and increases stasis risk.
• If appetite drops or fecal output changes, seek immediate veterinary care (GI stasis is time-sensitive).

Toxic plants and foods to avoid

Absolute (common) toxins for rabbits — avoid all parts of these:

• Avocado (persin toxin) — potentially severe
• Rhubarb leaves, tomato leaves, potato leaves (solanine/oxalates)
• Onions, garlic, chives (hemolytic compounds)
• Chocolate and caffeine
• Apple seeds, cherry pits, stone fruit pits (cyanogenic compounds)
• Foxglove, oleander, rhododendron, azalea, yew, lily of the valley, nightshades
• Houseplants such as philodendron, dieffenbachia — many common indoor plants are toxic

Sample daily feeding guideline (adult, ~3–4 kg / 6.6–8.8 lb)

• Unlimited grass hay (timothy/orchard) available all day
• Pellets: 40–60 g/day (one measured portion in the morning)
• Fresh greens: 2–4 cups mixed leafy greens/day (spread across morning/evening)
• Small fruit treat: 1–2 teaspoons 2–3 times/week
• Fresh water ad libitum

Feeding schedule and practical tips

• Morning: measured pellets + fresh water + portion of leafy greens
• Daytime: unlimited hay available; encourage foraging with hay racks and toys
• Evening: leafy greens + another hay refill
• Treats: give rarely and always in small amounts, as a training reward

Signs your diet is working

• Stable ideal body condition score (ribs palpable with slight fat cover)
• Regular production of two fecal types: round dry droppings and cecotropes that the rabbit reingests
• Consistent hay intake and normal appetite for pellets/greens
• Active, alert behavior and good grooming
• Healthy coat and normal tooth wear

Red flags — when diet needs adjustment or vet assessment

• Reduced appetite or reduced hay intake
• Decrease or change in fecal quantity/consistency (small, dry or no droppings)
• Diarrhea or very soft feces
• Weight loss or gain outside target range
• Decreased cecotrope production or failure to reingest
• Signs of dental disease (drooling, dropping food, weight loss)
• Lethargy, grinding teeth (pain), hunching

Transitioning to a new diet (how to change foods safely)

• Introduce new items slowly over 7–14 days: start at 10% new / 90% old and gradually increase the new component while monitoring stool.
• When reducing pellets, do so slowly: reduce by 10–20% every 3–7 days while increasing hay and leafy greens.
• Introduce new greens one at a time to watch for digestive upset.
• If stool softens, back off the new food and return to the previous diet; consult your veterinarian if changes persist.

When to consult a professional

• For precise caloric prescriptions (weight loss/gain plans), complex medical conditions (kidney disease, dental disease, pregnancy, young/growing rabbits), or recurrent GI issues, consult your veterinarian or a board-certified veterinary nutritionist for individualized recommendations.

Selected references and further reading

• WSAVA Global Nutrition Toolkit and clinical nutrition resources
• Merck Veterinary Manual — Rabbit Nutrition and Feeding
• Harcourt-Brown, F. M. (Rabbit Medicine and Surgery) — clinical nutrition sections
• House Rabbit Society — practical feeding recommendations and pellet/hay guidance

Frequently Asked Questions