How much onion is toxic to dogs?

In this short article, we will answer the question “How much onion is toxic to dogs?” and will show what other food are toxic to dogs and what to do if they ingest them.

Pets are naturally curious, and even under the tutor’s continual supervision, they may eat things that are bad for their health. Find out which foods are poisonous to dogs and what to do if they eat them if you have a pet at home.

How much onion is toxic to dogs?

A 45-pound dog would only need to consume one medium-to-large onion in order to reach poisonous levels because it only takes 100 grammes of onion (roughly the size of a moderate onion) per 20 kilos of a dog’s weight to produce toxic effects.

Allicin, a compound found in both onions and garlic, has been linked to hemolytic anaemia in dogs. 

Red blood cells, which carry oxygen in the blood, are destroyed in this process. It takes a lot of raw onion or garlic for the animal to become intoxicated, and this happens gradually.

What items are off-limits for dog food?

Sweets and chocolate

Theobromine, a deadly stimulant for dogs and cats that functions similarly to caffeine, is a component of chocolate. The heart, kidneys, and central nervous system of your pet can all be impacted by even little amounts. 

Diarrhoea, vomiting, trembling, hyperactivity, and, in more serious cases, seizures, are all signs of poisoning. It is among the foods that are most harmful to dogs. 

On the other hand, since sweets are high in sugar, they can lead pets to become diabetic and obese in addition to causing tartar to grow, cavities to form, and even tooth loss.


Compared to us, dogs are more sensitive to the effects of coffee. The signs of poisoning are comparable to the effects of eating chocolate.


Milk is not good for dogs since it includes sugar for the same reasons that sweets are not good for dogs. The drug can cause diarrhoea, vomiting, and other gastrointestinal issues when consumed.

Despite how common the picture of a cat sipping milk from a bowl is, milk can really be quite harmful to animals. 

This is due to the fact that the animal’s body cannot metabolise the protein lactose, which is present in cow’s milk and can result in gastrointestinal issues including diarrhoea and vomiting.

Tomatoes and potatoes

Solanine, which is abundant in potatoes and may contribute to the animal’s gastrointestinal problems and central nervous system depression. Dogs are poisonous to the glycoalkaloids found in tomatoes.


Dogs’ digestive systems struggle to metabolise vegetable fat, hence avocado is not a fruit that is suggested for them. 

Another issue is that the oil-soluble toxin idioblast, which is found in the cells of the avocado, can occasionally be consumed in excessive doses and induce heart failure and inflammation of the mammary glands.

Fatty and fried foods

Fries, pizzas, cheeses, and other foods from our diet can upset an animal’s digestive tract, resulting in pancreatitis, an inflammation of the pancreas that can be fatal.

Bones and fishbones

One of the leading causes of mortality in domestic dogs is the ingestion of hazardous food remnants. They frequently swallow bones or spine fragments that can choke them or even perforate their stomachs.

The consumption of animal bones can also raise the blood’s level of calcium, which can lead to renal issues and an increase in the mineral’s concentration in the urine.


This is yet another common cooking ingredient that is bad for dogs. Olives contain a lot of sodium, which in animals can lead to chronic hypertension and kidney issues.

What should I do if my dog consumes something bad for them?

It is best to get your dog or cat to the doctor as soon as you see any poisoning symptoms in them. Don’t try to get rid of the hazardous stuff, say, by making him throw up. Despite the best of intentions, a procedure carried out by a layperson may make matters worse.

After determining the type of intoxication, the vet will likely perform a stomach lavage on the animal in the clinic. It’s crucial to keep in mind that the sooner the pet receives medical attention, the better its prospects for survival are.

The easiest approach to keep your pet from being drunk is to treat him like a child: if he stays indoors, make sure that all dangerous items are kept out of reach and don’t allow him to play in places where these items are kept, including laundry rooms and warehouses.


In this short article, we answered the question “How much onion is toxic to dogs?” and have shown what other foods are toxic to dogs and what to do if they ingest them.