How much hay should a rabbit eat every day?

As a general guide, a bundle roughly the size of the rabbit's own body, available at all times rather than given once a day. Most rabbits nibble at it steadily throughout the day and night rather than eating it all in one go.

Can a rabbit eat too much hay?

No, hay is the one thing a rabbit should always have unlimited access to, unlike pellets or fresh vegetables, which do need limiting. Their digestive system is built to process a near-constant supply of fibre.

What happens if a rabbit doesn't get enough hay?

Without enough hay, a rabbit's continuously growing teeth can overgrow, and their digestive system is at greater risk of slowing down, known as gut stasis, which can become a serious and sometimes life-threatening condition. Both are strong reasons hay needs to be the main part of the diet.

My rabbit won't eat hay — what should I do?

Try a different type or a fresher batch, since rabbits can be surprisingly fussy about quality and smell, and offer it before pellets or vegetables so it is not being ignored in favour of tastier food. If they continue refusing hay or seem unwell, speak to your vet promptly rather than waiting.

How much hay does a rabbit need?

A rabbit needs constant access to hay, in a quantity roughly the size of their own body every day, with fresh hay always available rather than given as an occasional extra. Hay should make up the large majority of what a rabbit eats — far more than pellets or fresh vegetables — because their digestive system and teeth both depend on it.

Why rabbits need so much hay

A rabbit's teeth grow continuously throughout their life, and chewing fibrous hay is what wears them down at a matching rate. Without enough hay, teeth can overgrow and cause real pain and eating difficulties, which is one of the most common preventable problems seen in pet rabbits.

Hay also keeps the digestive system moving correctly. A rabbit's gut is designed to process a near-constant stream of fibre, and a rabbit who is not eating enough hay is at real risk of gut stasis, a serious and sometimes life-threatening slowdown of the digestive system.

How much, and what kind

As a general guide, offer a bundle of good quality hay roughly the size of your rabbit's own body every day, topped up as it is eaten down rather than filled once and left. Most of that will be nibbled throughout the day and night, since rabbits naturally eat little and often.

Good quality grass hay such as timothy or meadow hay should form the bulk of it, kept dry and stored somewhere it will not go mouldy. Straw is sometimes offered for bedding but is not a substitute for hay as food.

Signs the balance needs a closer look

A rabbit who is leaving most of their hay and filling up on pellets or vegetables instead is worth addressing, since that pattern can lead to the dental and digestive problems hay is there to prevent. Try offering hay before other food, and reduce pellets if they are being used to overeat.

If your rabbit stops eating hay altogether, seems less interested in food generally, or their droppings become smaller or stop, treat that as urgent rather than something to watch — a rabbit who has stopped eating needs to see a vet promptly, since gut stasis can progress quickly.

Common questions

How much hay should a rabbit eat every day?: As a general guide, a bundle roughly the size of the rabbit's own body, available at all times rather than given once a day. Most rabbits nibble at it steadily throughout the day and night rather than eating it all in one go.
Can a rabbit eat too much hay?: No, hay is the one thing a rabbit should always have unlimited access to, unlike pellets or fresh vegetables, which do need limiting. Their digestive system is built to process a near-constant supply of fibre.
What happens if a rabbit doesn't get enough hay?: Without enough hay, a rabbit's continuously growing teeth can overgrow, and their digestive system is at greater risk of slowing down, known as gut stasis, which can become a serious and sometimes life-threatening condition. Both are strong reasons hay needs to be the main part of the diet.
My rabbit won't eat hay — what should I do?: Try a different type or a fresher batch, since rabbits can be surprisingly fussy about quality and smell, and offer it before pellets or vegetables so it is not being ignored in favour of tastier food. If they continue refusing hay or seem unwell, speak to your vet promptly rather than waiting.

Sources

Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.

Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.