Can Dogs Eat Lettuce? It Depends on How It’s Been Prepared

Two dogs eating lettuce at a table with a checkered tablecloth
© David Charles Cottam/

Written by Austin S.

Updated: July 10, 2022

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As a dog owner, your dog is an integral part of your family. There’s no doubt that you would want to treat it like family. This includes feeding your dog the food you eat. However, In as much as you love feeding your dog human food, some of them are dangerous to your pet. 

Furthermore, humans munch on leafy greens like tomatoes, lettuce, and cabbage to stay fit and healthy. It is not unusual for your dog to munch on leaves and grass while taking a walk outside. But is lettuce a healthy leafy green for your dog? 

There are many different varieties of lettuce, and they are all prepared differently. You can also find lettuce in other human foods like burgers and salads. The question then is, “Can Dogs Eat Lettuce?” This article will provide the information you need to know regarding the safety of lettuce for dogs. 

Can Your Dog Eat Lettuce?

Yes, your dog can eat lettuce. Dogs are omnivorous animals, so they can eat plants and meat. The lettuce leaf itself is not dangerous or toxic to your dog. But remember that with any human food you want to give your dog, moderation is needed. 

Besides, lettuce contains about 90% water. Thus, it is a great treat to keep your dog hydrated. Lettuce is also low in fat and calories. This makes it a good food choice for your diabetic and obese dog. Three types of lettuce varieties are safe for your dog to eat. They include:

  • Romaine 
  • Iceberg
  • Arugula

Furthermore, remember the 90/10 rule when feeding your dog human food. Ensure that 90 % of your dog’s nutrition should come from vet-approved dog food. You can dedicate the other 10% to human food or dog treats. If you plan on feeding your dog lettuce, only give them small quantities. Too much lettuce can cause gastrointestinal issues in your dog. 

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What Are the Nutritional Benefits of Lettuce to Your Dog?

The nutritional benefits of lettuce to your dog depend on the lettuce variety. Iceberg lettuce, for example, contains mostly water and very little nutrition. Generally, lettuce contains few nutrients that can benefit your dog. Below are the nutritional benefits of lettuce to your dog.  

Vitamin A

Vitamin A helps to prevent cellular damage in your dog. It also helps with the proper function of your dog’s vision. Generally, vitamin A is excellent at keeping your dog’s cells functional. 

Vitamin K

Vitamin K is great for blood clot functionality. It also helps to improve bone function in your dog. Lettuce can be great for dogs suffering from blood-related diseases. 


Chlorophyll is a phytochemical that gives leafy greens their green color. It is like hemoglobin which aids red blood cells in retaining oxygen. Chlorophyll helps to replenish the red blood cells and boost the immune system of your dog. It also helps to heal wounds, fight infections and cleanse the cells of the dog’s body. 

This phytochemical can help reduce issues related to the digestive system, liver, and blood. Chlorophyll is great for dogs with bad breath. It acts as a natural mouthwash. 


Lettuce contains a high amount of fiber. It helps to control your dog’s digestive system. Fiber can also improve your dog’s gastrointestinal health and reduce constipation.  

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How Can Lettuce Be Bad for Your Dog?

Although lettuce is not necessarily toxic to your dog, it has some risks. 

Gastrointestinal Issues

Too much of a good thing can be wrong. Thus, feeding your dog too much lettuce can cause stomach issues. If you want to avoid gastrointestinal issues, offer lettuce to your dog in small quantities. 

Lettuce has a high amount of fiber.  Thus, your dog might find it difficult to digest in large quantities. Small dog breeds will find it more difficult to digest large amounts of lettuce than larger dogs. Thus, you will have to offer lettuce to your dog in bite sizes to avoid issues like diarrhea. 

Food Poisoning 

Ensure that you wash the lettuce very well before feeding it to your dog. If you don’t wash the lettuce, your dog is at risk of eating lettuce contaminated with bacteria like salmonella. By washing the lettuce, you can prevent the spread of common bacteria found in lettuce. 

Furthermore, the lettuce might be coated with fertilizers. These chemicals can be hazardous to your dog in large amounts. Thus, you should wash the lettuce thoroughly before feeding it to your dog. 

Potential Choking Accidents 

Large pieces of lettuce can be difficult for your dog to chew and swallow. They might not be a problem for your senior dogs to eat. But your puppies will find it difficult to swallow the large pieces. This can result in choking accidents if the lettuce pieces get stuck in your puppy’s throat. 

If you insist on feeding your dog lettuce, cut it into small bite-sized pieces. This will make it easy for your dog to chew and swallow, no matter the size of the dog. 

Kidney or Bladder Stones

Be careful of the type of lettuce variety you feed your dog. Some lettuce varieties have the potential to harm your dog. Lettuce varieties like spinach and kale can be dangerous to your dog in large quantities.

Spinach contains high amounts of oxalic acid. Oxalic acid in large amounts impacts the absorption of minerals like magnesium and calcium. This hindrance can lead to kidney stones.  Kale contains high amounts of calcium oxalate, which can cause bladder or kidney stones.

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What Should You Do if Your Dog Gets Sick From Eating Lettuce?

Lettuce is not toxic or dangerous to your dog. But there are instances where your dog might get sick from eating lettuce, as indicated in the section “How Can Lettuce Be Bad for Your Dog?” above. When this happens, watch your dog for symptoms. If severe symptoms like diarrhea or vomiting occur, visit your vet immediately. 

Can Your Dog Eat Salads?

No, your dog can’t eat salads. You might be enjoying a bowl of salad and want to feed your dog a piece of lettuce. If this is something you used to do, stop doing it. Salads contain different ingredients that can be harmful to your dog. For example, onion is highly toxic to dogs and can be found in many salads. 

Furthermore, your salad dressing is also wrong for your dog. Salad dressing contains a high amount of oils and fat that your dog doesn’t need. Problems can arise from your dog overeating salad dressing. Stick to bagged lettuce or raw lettuce rather than feed your dog lettuce from a salad. 

How Should You Feed Lettuce to Your Dog?

Before you incorporate human food into your dog’s diet, first consult your vet. Your vet will be able to tell you if you can incorporate the food into your dog’s diet or not. Remember that lettuce is a very fibrous food. Thus, if your dog has issues digesting foods like lettuce, your vet can recommend other alternatives. 

There are some rules you need to follow when feeding lettuce to your dog:

Washed Lettuce

Before you feed lettuce to your dog, ensure that you wash it thoroughly under cold water.  Washing will remove any bacteria or chemicals on the lettuce. This rule applies to all fruits and vegetables you want to feed your dog. 

Stick to Plain Lettuce

Avoid feeding your cooked lettuce to your dog. Raw or plain lettuce is better than cooked lettuce. Cooked lettuce can have additional ingredients and oil that will harm your dog. Avoid adding dairy products, onion, salt, or oil to your dog’s lettuce. These ingredients can lead to dehydration or gastrointestinal issues. 

Bite-Sized Pieces

Ensure that you cut the lettuce into small pieces before feeding your dog. Doing this will help you prevent choking accidents in your dog. You can also steam the lettuce a little with water. This will make it easy for your dog to chew and digest. 

Can Your Dog Be Allergic to Lettuce?

Dogs can be allergic to any human food they eat. Thus, your dog can be allergic to lettuce. Anytime you feed your dog a new human food, start slowly and watch it for signs of discomfort. If it shows an adverse reaction to the food, visit your vet immediately. 

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Healthier Vegetables You Can Feed Your Dog

The nutritional benefits of lettuce are very minimal. Here are some other vegetables that will give your dog more nutritional benefits. 

Final Note

Lettuce is safe for your dog in raw and small amounts. Certain foods cause adverse effects in dogs, so It is always better to check with your vet before feeding your dog a new human food. Although lettuce is safe for your dog, it doesn’t offer many nutritional benefits and it has the potential to cause some health issues. Thus, it is better as an occasional crunchy treat for your dog. 

Adding lettuce to your dog’s diet does not affect it negatively. As long as you feed it lettuce in moderation, your dog can enjoy this crunchy treat on occasion. 

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About the Author

Growing up in rural New England on a small scale farm gave me a lifelong passion for animals. I love learning about new wild animal species, habitats, animal evolutions, dogs, cats, and more. I've always been surrounded by pets and believe the best dog and best cat products are important to keeping our animals happy and healthy. It's my mission to help you learn more about wild animals, and how to care for your pets better with carefully reviewed products.

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