Can Dogs Eat Lasagna? How Toxic Is It?

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can dogs eat lasagna

No, dogs should not eat Lasagna. The main ingredients in Lasagna are onions, tomato sauce, and garlic which are toxic to dogs. Lasagna also contains cheese which is harmful if your dog is lactose intolerant.

Can dogs eat lasagna from time to time? Read through to learn more about dogs and Lasagna.

So Can Dogs Eat Lasagna Safely?

A typical lasagna recipe has onions, cheese, garlic,  pepper, and tomato sauce. These ingredients are safe for humans but can be life-threatening for dogs.

The cheese content in Lasagna is too high for dogs to digest appropriately. Onions and garlic have a chemical called thiosulphate which is toxic to dogs.

Why Isn’t Lasagna Safe For Dogs?

Lasagna can cause some health problems to your dog, because of the ingredients it contains. Below, we will talk more about each toxic ingredient.

Onion and Garlic


Onions and garlic are members of the allium family, and they have a chemical called thiosulphate which causes poisoning in dogs.

Intake of onions and garlic in small amounts may not necessarily harm your dog, but Lasagna has lots of onions and garlic; thus, the toxicity levels are high.



Although a small amount of pepper cannot harm your dog, consumption in large amounts can cause gastrointestinal problems. 

Lasagna has a lot of pepper which makes it harmful for dogs.

In addition, the peppers in Lasagna are cooked with the toxic onions and garlic; hence it  is safe to avoid



Consumption of oregano in moderation is safe for your dog. Lasagna contains lots of oregano which gives Lasagna its heavenly taste. 

The symptoms to watch out for include vomiting, diarrhea, weakness, and depression. Other rare symptoms include a decreased heart rate, low blood pressure, and ulcers along the gastrointestinal tract.



Lasagna has lots of cheese, and consumption may lead to stomach upsets for your dog.

Cheese also contains lactose which is hard to digest, especially for older dogs. This results in bloating, dehydration,  and excessive thirst

Furthermore,  high cheese consumption can cause obesity, heart problems, and pancreatitis in dogs.

What are the health problems of feeding your dog Lasagna? 

We talked about the toxic ingredients Lasagna has that can cause your dog health problems. Now let’s talk a little bit about each potential health problems that may appear.


The poisonous chemical in onions and garlic causes hemolytic anemia in dogs.

They destroy the red blood cells, which are responsible for the supply of oxygen in the body.

Poor oxygen supply to the major parts of the body like the heart and brain can be fatal for your dog. 

Heinz body formation

Heinz body formation results from the consumption of onions and garlic, which are the main additives in Lasagna.

Heinz bodies cause oxidative damage to the red blood cells, thus making it hard for blood to reach all the essential tissues and organs.

Extreme tiredness is the main symptom of Heinz’s body formation.

Upset stomach

The high amounts of garlic, onions, pepper, tomato sauce and garlic will make your dog have stomach upsets.

This will be presented by symptoms like vomiting, diarrhea, and abdominal pain. 

In addition, tomato sauce is acidic hence causing stomach discomforts like heartburn. Acidity can also irritate the stomach lining.

Stomach ulcers

Stomach ulcers are sores along the stomach lining. The high-fat content of Lasagna and acidity from tomato sauce cause stomach ulcers in dogs.

The toxic chemical in onions and garlic can also cause stomach ulcers. The symptoms associated with stomach ulcers include abdominal pain, lack of appetite, and drooling.

If you are worried about your dog’s lack of appetite, read our article on How Long Can A Dog Go Without Food.

Low blood pressure

Consumption of Lasagna causes anemia in dogs, leading to a dip in blood pressure levels.

Anemic dogs are prone to frequent periods of low blood pressure due to the low oxygen supply to the major organs and tissues. Poor oxygen supply to the major organs can lead to organ failure, which can cause death.

Oregano is also responsible for low blood pressure

What Happens If your Dog Eats Lasagna?

Your dog will present the symptoms below after eating Lasagna. It takes 30 minutes to two hours for the symptoms to occur.

  • Vomiting
  • Diarrhea
  • Lethargy
  • Excessive salivation
  • Abdominal pain
  • Increased heart rate
  • Irritation of the mouth
  • Pale gums
  • Panting
  • Fainting
  • Low blood pressure
  • Fatigue 

If your dog ate Lasagna and is showing any of the symptoms given, you should take him to the vet for diagnosis and treatment.

What To Do If Your Dog Eats Lasagna?

Dogs enjoy eating human food and may take a bite of Lasagna when you are not looking.

If your dog accidentally eats Lasagna, the best thing to do is go to the vet as Lasagna, especially in large amounts, can lower the blood pressure and lead to death.

Onion Toxicity In Dogs

If your dog is suffering from onion toxicity, you will notice the following symptoms :

  • Lack of appetite
  • Reddish urine
  • Lethargy
  • Weakness
  • Pale gums
  • Elevated heart rate
  • Vomiting

These signs may take several days to manifest; hence you should keenly monitor your dog for any change in behavior and general appearance.

Factors that could alter the toxicity

How bad Lasagna affects your dog depends on more factors. Let’s talk about each one:

Size of the Dog

The impact of lasagna toxicity depends on the size of your dog. A  bite of Lasagna may not cause severe problems for adults compared to puppies.

The older the dog, the lesser the impact of poisoning as they can digest food better than younger dogs whose digestive system is not fully developed.

Breed of the Dog

Some dog breeds are more prone to lasagna poisoning than others. They include the following

  • Shiba Inu
  • Akita Inu
  • Hokkaido Inu
  • Kishu Ken
  • Khai Ken
  • Shikoku
  • Japanese Chin

These dog breeds are the Japanese type, and their genetic makeup makes them more prone to poisoning than other dog breeds.

Underlying Gastrointestinal Conditions

Dogs with underlying gastrointestinal conditions are easy prey to lasagna poisoning. The existing gastrointestinal problems make the stomach less immune.

Gastrointestinal conditions that predispose dogs to poison include :

  • Lactose intolerance
  • Constipation
  • Bloating
  • Gastritis
  • Gastrointestinal ulcers
  • Gastrointestinal obstruction
  • Colitis
  • Hemorrhagic Gastroenteritis

When to visit your vet 

Lasagna in large amounts can be fatal for your dog. You should visit your vet if your dog depicts the following symptoms:  :

  • Difficulty breathing
  • Fainting
  • Wining sounds which means your dog is in pain
  • Reddish urine
  • Lack of appetite
  • Bloody diarrhea
  • Low blood pressure

Treatments For Lasagna Poisoning

The vet may induce vomiting to eject lasagna poison from your dog’s system. You may use activated charcoal to bind the poison, thus preventing further absorption.

In case of low blood pressure, the vet may administer pressure-boosting fluids.

If your dog has been adversely affected, a blood transfusion may become necessary.

How to make dogs-friendly Lasagna? 

A friendly lasagna for your dog should be void of tomato sauce, garlic, onions, pepper, and cheese. Vegetable alternatives like spinach with lean ground beef are an alternative.

You can also make a dog-friendly lasagna with lean ground beef, organic zucchini as a lasagna pasta substitute. Boil the zucchini until tender to soften it and make chewing easier, then cook the ground-cooked beef with a small portion of basil for flavor. 

The zucchini is then layered in a baking dish with the cooked ground beef and baked as a casserole.

Serve your dog-friendly Lasagna at room temperature.

Read our article on Can Dogs Eat Zucchini? 4 Benefits Of Zucchini to learn more about zucchini and dogs’ nutrition.

Canine-friendly alternatives to Lasagna

There are healthy alternatives to Lasagna for canines, and they include:

Puppy-friendly Lasagna

This type of Lasagna is safe and healthy for dogs as it has ingredients like basil, organic beef, and pasta which cannot have adverse effects on your dog.

You can also replace pasta with fresh vegetables to make it healthier for your dog.

Vegetable casserole

This is a combination of vegetables, ground turkey, and brown rice safe for your fur baby.

Vegetables are low in calories and contain vitamins A and C for a shiny coat and improved immunity. Potassium in the vegetables aids in muscle maintenance and strengthens the bones.

Ground turkey provides the necessary proteins for your dog, while brown rice is rich in fiber, thus aiding digestion.

Chicken casserole

Another healthy alternative for Lasagna is Chicken casserole, a mixture of brown rice, vegetables, and chicken breast. These ingredients are safe for your dog, and they provide the required nutrients and minerals.

Chicken casserole is also a balanced diet meal as it has vitamins from vegetables, carbohydrates from rice, and proteins from the chicken breast.

Dogs are, however, different and have different reactions to food types. Introduce new food gradually until your dog becomes used to it

Can dogs eat lasagne sheets? 

No, dogs should not eat lasagne sheets. The ingredients in lasagne sheets are toxic for dogs. Health issues like anemia, vomiting, and stomach upset are associated with ingestion of the ingredients.

Can Lasagna kill dogs? 

Yes, Lasagna can kill young dogs and even older dogs if ingested in large quantities. The side effects can be fatal if not treated immediately. Avoid Lasagna in dog diets.

Why is tomato sauce in Lasagna dangerous for your dogs? 

Tomato sauce is highly acidic and contains garlic and onions. Tomato sauce poses a danger for dogs since it brings together all its effects, plus those of onions and garlic. 

Can your pup eat home-cooked Lasagna? 

Yes, your pup can eat homemade Lasagna.

This is because the homemade Lasagna can be tailor-made to suit your dog. No allergic ingredients and the toxic ones are eliminated.

How long does it take for a dog to pass something they ate? 

It takes about 10 to 24 hours for a dog to pass what they ate[1]. Those easy to digest take a shorter time while others are difficult to digest. 

the Bottom Line

Dogs can’t eat Lasagna as it contains ingredients like cheese, onion, garlic, pepper, and tomato sauce which are harmful to dogs, and its effects can be fatal.

Onions and garlic contain toxic chemicals, while cheese contains lactose which some dogs may not easily digest. It is best to avoid Lasagna for your dog to not expose them to these risks associated with Lasagna.

In place of the traditional Lasagna, find friendly Lasagna containing zero toxic ingredients.

You can substitute the toxic ingredients with healthy alternatives like organic hamburgers, zucchini, organic tomato, and organic basil leaves at home.

If you are interested in basil and dogs’ nutrition, read our article on Can Dogs Eat Basil?

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Belinda Kendi
Belinda Kendi is a talented content marketer and dog food copywriter who produces relatable and valuable content.

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