Get

In Your Inbox

Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Can Dogs Eat Watercress? Vet Reviewed Facts & Safety Guide

Can Dogs Eat Watercress

Canines are omnivorous creatures that can eat many different plants like vegetables, fruits, herbs, and greens. However, that doesn’t mean certain plants aren’t unhealthy, or even dangerous, for your companion. Of all the good and bad vegetables, where does watercress fall?

You should not feed your dog any variety of watercress, unfortunately. It could lead to bouts of diarrhea and vomiting, being ultimately uncomfortable and problematic for your dog. It might also carry heavy metals or bacteria that can make your dog very ill. We will explain the potential consequences in this article.

divider dog paws 4 oct 2024

Dogs Shouldn’t Eat Watercress

If your dog ate watercress, it is a good idea to contact your vet. According to the ASPCA, watercress, or Nasturtium officinale, is mildly toxic to dogs, cats, and horses. Your dog shouldn’t eat any of this substance, as it can cause uncomfortable side effects.

If your dog consumed watercress, you should contact poison control or your veterinary office for guidance. Generally, it causes mild side effects that will pass at home. However, if your dog ate large quantities, it could lead to a vet visit for further treatment.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the personalized advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content Savings V1

What Is Watercress Exactly?

Watercress is a dark leafy green that offers a wide range of health benefits to humans. Watercress easily grows in alkaline waters and spring runs. It can easily grow in most North American areas.

Many people can grow local watercress, though it is often bought from grocery stores in the produce section. You can use this plant to spruce up salads and several other dishes. However, these same benefits do not extend to our canine companions.

All forms of cress, including American cress, winter cress, and watercress are toxic to dogs. Since watercress has a bitter, peppery taste, most dogs will have no interest in this plant. On the rare occasion that your dog does, you should keep it from their reach.

divider single dog paw oct 2024

Risks Associated with Watercress Consumption

If your dog consumes watercress in any quantity, it can have an impact on their health. Some of these issues will pass in a few days, while others require veterinary intervention, such as medications or treatments.

Gastrointestinal Upset

The primary problem with watercress consumption is the impact on your dog’s gastrointestinal system. According to the ASPCA, it is toxic to dogs, cats, and horses, disrupting the GI system.

Sick and unhealthy yellow Labrador Retriever dog coughing in a park or Kennel cough symptom
Image Credit: Dhanoo Surasarang, Shutterstock

Signs of Gastrointestinal Upset

Watercress is described as a gastrointestinal irritant.

It causes traditional signs of upset, like:
  • Vomiting
  • Diarrhea
  • Abdominal discomfort

Usually, these signs go away on their own. However, if your dog seems to be getting sicker or shows other signs of distress, it could be more serious than an upset stomach.

Contracting Bacteria or Parasites

If you feed your dog watercress that has grown wild in nature, they can contract several bacterial and parasitic infections. Usually, with proper washing, most bacteria can be avoided, but it’s a prime environment for certain germs to thrive.

Liver Fluke

Watercress can carry a parasite called liver fluke. Liver fluke is very rare in the United States. Most infections occur in Europe, Asia, Africa, and South America.

dog sad sick sleeping bored
Image Credit: Przemek Iciak, Shutterstock

Signs of Liver Fluke 

Liver fluke is more prevalent among young adult dogs. Clinical signs appear from a few days to several months after exposure.

Signs of liver fluke include:
  • Lethargy
  • Weight loss
  • Vomiting
  • Diarrhea
  • Yellowed skin
  • Inappetence

Infected dogs can be treated, but this requires veterinary oversight.

Bacteria

Harmful bacteria, particularly E. coli, are very prevalent in watercress. If your dog encounters salmonella, E. coli, listeria, or any other foodborne toxin, it can have serious consequences. A pet with foodborne illness will need proper supportive care.

Signs of Bacteria Exposure 

If your dog is at risk for toxicity, it is good to know the signs so you can be prepared to act. While most dogs recover from these ailments, they can be very dangerous and cause severe dehydration.

Signs of foodborne illness include:
  • Drooling
  • Vomiting
  • Diarrhea
  • Stumbling
  • Bloody stool
  • Loss of appetite

If you believe your dog has had any sort of toxic exposure, get them to your vet without delay. Dehydration can quickly lead to more serious issues if it isn’t properly treated.

dog not eating its food
Image Credit: Daria Lixovetckay, Shutterstock

divider dog paws oct 2024

Other Toxic Plants to Be Aware of

Watercress isn’t the only plant that is perfectly acceptable for humans but not pets. Here is a quick list of some other toxic plants and herbs for dogs:

  • Garlic
  • Chives
  • Leeks
  • Onions
  • Scallions
  • Shallots

If you want to have a handy resource for toxic plants, the ASPCA has this list to help keep your household pets safe.

divider dog faces oct 2024

Final Thoughts

Watercress is not suitable for dogs. Even though it can offer quite a few benefits to people, it isn’t healthy for dogs and can pose several health risks if it is ingested.

If your dog has already eaten watercress, make a quick phone call to your vet for guidance. They may want you to wait at home to monitor your dog or bring them in for further evaluation.

See Also:


Featured Image Credit: Vicky25, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Shar-Pei Colors: 20 Coat Colors Explained (With Pictures)

Wrinkly skin with a blue tongue, the Shar-Pei is a unique breed whose Chinese name translates to “sand skin.” Three types of coats...

How to Find an Ethical Dog Breeder: Vet-Approved Verification Guide

An ethical dog breeder is someone who breeds dogs to improve or preserve the breed. They choose to invest in breeding and prefer...

10 Dog Wedding Dress Ideas for Your Pup (With Pictures)

Whether you’re the bride and want your dog’s attire to match your dress or you’re doing a wedding photoshoot with your pups, helping...

Can Dogs Be Schizophrenic? Vet-Verified Mental Health Facts

Maybe your dog’s personality has suddenly done a 180. The sweet pup you cuddled with on the couch acts aggressive and perhaps growls...

More related

How to Train Mixed-Breed Dogs: 9 Vet-Approved Tips

Adopting a mixed-breed dog invites a world of joy into the home and plenty of guesswork about how you should train them. While...

5 Best Vet-Approved Fly Repellents for Dogs in 2025 – Reviews & Top Picks

As dog owners, we know how much our dogs love to spend time outdoors. We also know that keeping fleas and ticks off...

European vs. American Basset Hound: Main Differences (With Pictures)

Basset Hounds are recognizable for their floppy ears, wrinkles, low-to-the-ground bellies, and droopy eyes, but did you know the difference between European and...

Can Dogs Be Left or Right Pawed? Vet-Approved Facts & Explanation

Everyone knows humans can be right-handed or left-handed, but have you ever wondered the same about your dog? As it turns out, some...

Keep reading

Can Dogs Eat Quesadillas? Vet-Verified Risks & FAQ

It’s no secret that dogs want to eat everything they see us enjoying. Of course, as responsible dog owners, we know that isn’t possible. Certain foods are toxic to dogs while others simply aren’t good for them. One of the...

Can Dogs Eat Quesadillas

Can Dogs Eat Carne Asada? Vet Reviewed Facts & FAQ

You may be familiar with the phrase “puppy dog eyes.” That is why saying “no” to a dog is next to impossible when they want something, whether they want to play, get up on the couch with you, or eat...

Can Dogs Eat_carne asada

Dog Nutrition: 6 Vet-Approved Essential Nutrients They Need

Nutrition and a healthy diet play a significant role in a dog’s health and well-being. Dog owners must stay on top of their dogs’ nutritional intake and ensure that they’re eating a well-balanced diet that supports daily body functions. However,...

golden retriever dog eating food from feeding bowl

Can Dogs Eat Durian? Vet-Verified Nutrition Facts & Safer Alternatives

The durian fruit has gained a lot of attention for its pungent aroma rather than its taste or any health benefits. The fruit comes encased in a prickly shell, and “the king of fruits” has a smell that is described...

Dogster-Can-Dogs-Eat-Durian

Can Dogs Eat Flounder? Vet Approved Facts & Nutrition Guide

If your canine companion routinely gives you puppy dog eyes when you make flounder and begs for a bite, it can be difficult to resist giving them a taste. But before you give your pet any people food, it is...

Can Dogs Eat_flounder

10 Best Puppy Foods for Small Breeds in 2025 – Reviews & Top Picks

Small dogs may think they are big and intimidating, but their nutritional needs are unique. Small breeds have smaller stomachs and higher metabolisms, so they need nutrient-dense formulas to ensure adequate nutrition without weight gain. Finding the appropriate food for...

jack russell terier puppy eating food from bowl

TLC Dog Food Review 2025: Recalls, Pros & Cons

Review Summary TLC Dog Food is a Canadian dog food company different from your traditional pet foods. They offer four grain-inclusive recipes: one adult recipe, one puppy recipe, one cat recipe, and one dog biscuit recipe. They certainly lack options,...

Dogster_TLC Dog Food Review

Dog Food Alternatives: 6 Vet-Approved Options

As a dog owner, you are probably familiar with the panic you feel when you realize you have run out of dog food and are unable to get more at the moment. You might be scrambling around your pantry in...

beagle dog eating from bowl