What Can Rabbits Eat: A Complete Guide to Safe and Unsafe Foods

Why Hay Must Be 80% of the Diet

The rabbit GI tract is functionally different from most mammals. Rabbits are hindgut fermenters: they have a large cecum (proportionally much larger than a dog's or cat's) that uses microbial fermentation to extract nutrition from plant fiber. The cecal bacteria produce volatile fatty acids that provide a significant portion of the rabbit's energy, plus cecotropes -- soft pellets rich in B vitamins and protein that the rabbit eats directly from its anus. This system is entirely dependent on continuous input of long-strand indigestible fiber from hay.

When a rabbit doesn't eat enough hay: gut motility slows (GI stasis), cecal bacteria produce abnormal ratios of gas, cecotrope production becomes abnormal, and dental disease progresses because hay provides the necessary tooth wear. Long-strand fiber from grass hay (timothy, orchard grass, meadow hay) is not replaceable by any other food. Pellets are concentrated nutrition but do not provide the fiber needed for gut and dental health. Greens provide moisture, vitamins, and variety but lack the fiber volume of hay. Hay must be available at all times; rabbits should eat approximately their body weight in hay every 1-2 days.

Safe Leafy Greens

Dark leafy greens should be the primary fresh food. Offer 2 cups per 5 lbs of body weight per day, in a variety of 3-5 different greens. Safe greens include: romaine lettuce (good hydration, mild), green leaf lettuce, red leaf lettuce, bok choy (Chinese cabbage), cilantro, parsley (flat-leaf or curly), dill, basil, arugula (rocket), endive, escarole, radicchio, dandelion greens (excellent nutrition, high in calcium -- offer in moderation), carrot tops (nutritious, not the orange root), beet greens, watercress, wheatgrass, and oat grass.

Introduce one new green at a time and watch droppings for 24 hours. Loose, soft, or absent droppings after a new food indicate sensitivity -- remove that food and try again in a few weeks. Young rabbits under 12 weeks should not receive fresh greens; their digestive systems haven't established the cecal bacteria populations needed to handle them safely.

Vegetables That Require Caution

Kale, spinach, and Swiss chard are nutritious but high in oxalates and should be limited to 1-2 times per week. Broccoli, cauliflower, and cabbage can cause gas and bloating in some rabbits -- the cruciferous vegetables are safe for many rabbits but should be introduced carefully and discontinued if gas or soft stools result. Carrots and other root vegetables are high in sugar; a small 1-inch piece 2-3 times per week is appropriate as a treat, not a staple. Peas and corn are high in starch and sugar -- limit to small amounts. Bell peppers (remove seeds and stem) are safe and many rabbits enjoy them.

Safe Fruits (Treats Only)

Fruit should be strictly limited due to high sugar content -- no more than 1-2 teaspoons per 5 lbs of body weight per day, offered 2-3 times per week at most. Safe fruits: apple (remove seeds and core -- apple seeds contain amygdalin that metabolizes to cyanide), strawberries, blueberries, raspberries, papaya (contains papain, sometimes used as a GI motility aid), mango (remove pit), pear (remove seeds), watermelon (remove seeds). Avoid grapes and raisins -- while not definitively proven toxic in rabbits as they are in dogs, the sugar content is too high to recommend. Dried fruit has concentrated sugar; avoid.

What to Never Feed a Rabbit

Toxic or harmful foods: onions, garlic, and leeks (can cause blood abnormalities); avocado (persin is toxic); chocolate; xylitol (artificial sweetener -- potentially fatal, found in some peanut butter, gum, candy); rhubarb; potato and potato leaves; tomato leaves and stems (fruit in small amounts is probably safe but not recommended); iceberg lettuce in large quantities (high water content, very low nutrition, linked to diarrhea); dairy products; meat of any kind; bread, pasta, crackers, and other starchy foods (disrupt cecal bacteria and cause obesity); yogurt drops and corn-based treats marketed for rabbits (these contain excessive sugar and starch).

Muesli-style rabbit mixes sold in pet stores -- the colorful mixes with seeds, dried fruit, and pellets -- should be avoided entirely. Research from the University of Edinburgh showed that rabbits fed muesli diets had significantly higher rates of dental disease, obesity, and GI problems compared to hay-and-pellet-fed rabbits. Selective eating of the high-sugar components over the nutritious pellets is the primary problem.

Water: Requirements and Delivery

Rabbits need 50-150 mL of water per kg of body weight per day. A 4 kg (9 lb) rabbit needs 200-600 mL -- up to a full water bottle. Water requirements increase significantly in warm weather and for lactating does. Fresh water must be available at all times. Both water bottles and heavy ceramic bowls work; bowls often encourage higher water intake. Change water daily; wash the container daily. A rabbit eating primarily hay needs more water than one eating primarily fresh greens (which supply significant moisture).