Can Rabbits Eat Lettuce – Is Lettuce Safe?

It’s not always easy knowing what to feed a pet rabbit.

Foods that seem healthy aren’t always all that good for them. Even the humble carrot, long associated as a rabbit’s best friend can be very bad for their health if they have them too often.

But what about lettuce? Is lettuce a good food for rabbits to eat? Does lettuce have any health benefits for a rabbit, and are there any health risks associated with rabbits eating lettuce?

In this article I’ll take a look at these questions, showing you all the benefits and risks of lettuce for pet rabbits.

Lettuce does pose a health risk to your pet rabbit. Certain lettuce varieties should be avoided entirely and many provide very little nutritional benefits. However, there are some varieties of lettuce that are beneficial to your rabbit.

Which types of lettuce are bad for rabbits

Certain lettuce types are high in a chemical called lactucarium.

When rabbits digest lactucarium they have a mild sense of euphoria, much like the effects of a drug.

In large quantities lactucarium can be harmful to a rabbit and can cause issues with their digestive system such as diarrhea.

Large amounts of lactucarium combined with the very low nutritional value of some lettuce types make them worth avoiding as they are unlikely to give your rabbit any health benefits.

Because of this all lettuce types should be fed in moderation and some should be avoided altogether.

Light-colored and watery lettuce such as iceberg lettuce should not be fed to your rabbit as it has very little nutritional value and lots of lactucarium.

Which types of lettuce are good for rabbits

The best types of lettuce for your pet rabbit are darker color varieties. The leaves will be more fibrous and less watery than types like iceberg lettuce.

Often these types will have a stronger taste, as opposed to the very bland taste of iceberg lettuce.

These varieties of lettuce contain less harmful lactucarium and more of the beneficial nutrients which I’ll discuss below.

Some of the best types of lettuce for a pet rabbit include:

  • Green leaf lettuce
  • Red leaf lettuce
  • Romaine lettuce
  • Lamb’s lettuce

Health benefits of lettuce for rabbits

Whilst there are certain types of lettuce your rabbit should not eat, such as the light-colored watery ones I’ve laid out above, there are still some terrific health benefits they can gain from the darker colors, more nutritious types.

Here is a list of health benefits of lettuce for rabbits, that I’ll follow with some of the health risks.

Vitamin A

This is the vitamin that you’re parents told you would let you see in the dark, the one packed into carrots.

Well, it really does help support eyesight and is a great addition to your rabbit’s diet.

It is also great for young rabbits as a vitamin A deficiency can actually stunt growth. On top of that, it helps to support god immune and cell function.

Vitamin K

This is a fat-soluble vitamin that helps with blood clotting. It also aids bone metabolism and supports the regulation of blood calcium levels.


Antioxidants are believed to reduce the risk of a wide range of diseases.

These include heart disease and cancers. Antioxidants reduce the number of free radicals in your rabbit’s body.

Free radicals are atoms that attach themselves to cells in the body. These cells are then identified as an invader and damaged or destroyed, hence leading to serious diseases like cancer.


Calcium is a double-edged sword, of course, it has plenty of health benefits, but too much can also be harmful to your pet rabbit (we’ll discuss that later).

Calcium helps to build strong bones and teeth, as well as thick fur with that lovely shiny look.

In addition to that, calcium also helps to ensure the blood clots effectively and helps to regulate muscle contractions, that’s important for vital bodily functions such as ensuring a strong regular heartbeat.


Fiber is essential for healthy digestion. It has two categories, soluble and insoluble fiber.

Soluble fiber helps to control the blood sugar level of the body and aids in ridding the body of fatty substances such as cholesterol.

Insoluble fiber helps to keep the digestive system moving, it will add weight but also softens to your rat’s stools which in turn will help the digestive system to work effectively.

Folic Acid

Folic acid is vital for maintaining the structure of your rabbit’s cell membranes and is necessary for amino acid metabolism.


Magnesium is an essential macro-mineral.

It helps to maintain good nerve and muscle function, supporting the immune system, keeping bones nice and strong and maintaining a steady heartbeat.


This is a mineral that works alongside calcium to help maintain strong bones and teeth in your rabbit.


Potassium helps to maintain a healthy heart and good blood pressure.

Potassium has also been shown to support bone and muscle strength as the body ages.

Health risks of lettuce for rabbits

Although we never really associate lettuce with being unhealthy for humans, that isn’t the case for rabbits.

Lettuce can actually be quite harmful, let’s look at why.


This chemical is probably the main issue with lettuce and is found in its highest qualities in light-colored, watery lettuce like iceberg lettuce.

It is naturally occurring but it can have effects of euphoria on rabbits, and in too high a quantity it can harm their health.

Excess amounts of lactucarium can result in diarrhea and so light-colored lettuce should be avoided altogether.

Excess amounts of calcium

I’ve listed calcium as a benefit of lettuce above, but excess calcium can quickly become a problem for rabbits.

When there’s too much calcium in a rabbits diet their urine can thicken. This can cause urinary tract infections.

This is because rabbits don’t regulate their calcium intake in the way humans do. Humans will only absorb the amount of calcium they require during digestion, rabbits on the other hand will absorb all the calcium in their digestive system.

This means they can easily absorb too much calcium, so it’s important to never frequently feed your rabbit calcium-rich foods.

Some lettuces have little nutritional value

This is again mostly attributed to light colored and watery lettuce types.

Ones such as iceberg lettuce have very little nutritional benefit and mostly consist of water.

Combined with the high amount of calcium and lactucarium, there is not really any point in feeding your rabbit these types of lettuce, they have high health risks and very low nutritional value.

Can rabbits eat iceberg lettuce

Rabbits should not be fed iceberg lettuce.

Iceberg lettuce has lots of lactucarium which can be very harmful to your rabbit in large enough quantities.

There is also so little nutritional benefit in iceberg lettuce that there is no reason to feed your rabbit even a small amount, given the health risks.

Additionally, iceberg lettuce has a particularly high calcium content which can cause health issues for your rabbit.

Too much calcium will cause your rabbit’s urine to thicken and can cause a urinary tract infection.

Can lettuce harm my rabbit

Lettuce is unlikely to be fatal for your rabbit and it is not toxic; however, if your rabbit has excess amounts of lettuce that has a high lactucarium content (like iceberg lettuce) they may develop quite serious diarrhea.

Very bad diarrhea can be life-threatening to a rabbit as their body is unable to absorb the required nutrients and dehydration can quickly set in.

If your rabbit has only eaten a small amount of lettuce then serious impacts are unlikely.

If they have eaten a lot of lettuce and benign to show signs of diarrhea then you may want to consult with your vet

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