The Hidden Liabilities of Dog Ownership in Ontario: What Every Owner Needs to Know

May 04, 2026, Kitchener, Ontario

Posted by: Robert Deutschmann, Personal Injury Lawyer

Owning a dog is often seen as a joyful and rewarding experience. However, many dog owners in Ontario underestimate the legal and financial risks that come with pet ownership. Beyond routine responsibilities like feeding, training, and veterinary care, there are significant liabilities, especially if your dog bites another person or animal.

Drawing on Ontario law and insights from Deutschmann de Koning Personal Injury Law, this article explores the real risks of dog ownership and what happens when things go wrong.

Understanding Liability Under Ontario Law

In Ontario, dog ownership is governed primarily by the Dog Owners’ Liability Act (DOLA). This legislation imposes what is known as strict liability on dog owners.

Strict liability means that if your dog bites or attacks someone, or even another pet, you are legally responsible for the damages, regardless of whether you were negligent or aware of any aggressive tendencies.

Victims of dog attacks may suffer serious physical injuries such as puncture wounds, infections, and scarring, along with psychological harm like anxiety or post-traumatic stress.

What Happens If Your Dog Bites a Person?

If your dog bites another person in Ontario, the consequences can be significant.

1. You Are Automatically Liable

Under DOLA, the injured person does not need to prove negligence, only that your dog caused the injury.

2. You May Owe Compensation

You could be required to pay damages for:

• Medical expenses
• Lost income
• Pain and suffering
• Psychological treatment

These costs can add up quickly, particularly in cases involving serious injuries.

3. Shared Fault May Reduce Damages

If the victim contributed to the incident, for example by provoking the dog, the court may reduce the compensation amount.

4. Potential Court Orders

Courts can impose additional consequences, such as:

• Requiring the dog to be muzzled or restrained
• Declaring the dog dangerous
• In extreme cases, ordering the dog to be removed or euthanized

What If Your Dog Attacks Another Pet?

Many owners do not realize that liability extends beyond people. If your dog injures or kills another domestic animal, you are still legally responsible.

Under Ontario law, compensation may include:

• Veterinary bills
• Replacement value of the animal
• Related financial losses

The same strict liability principles apply, meaning fault does not need to be proven.

Financial Risks of Dog Ownership

Dog-related liability can lead to serious financial exposure.

Lawsuits and Legal Costs

Victims may file a civil claim, and even a relatively minor incident can result in thousands of dollars in damages.

Insurance Implications

While some homeowner or tenant insurance policies cover dog bites, coverage may be limited or denied depending on the breed or circumstances.

Long-Term Costs

Severe injuries can result in ongoing care costs, rehabilitation, and lost earning capacity. These expenses may ultimately fall on the dog owner.

Emotional and Social Consequences

Beyond financial liability, dog bite incidents can have lasting emotional and social impacts.

• Strained relationships with neighbours or community members
• Stress and guilt for the owner
• Fear or behavioural issues in the dog following the incident

As highlighted by Deutschmann de Koning, dog attacks are often sudden, traumatic, and life-altering, not just for victims but for everyone involved.

Who Is Considered a “Dog Owner”?

Under Ontario law, the definition of owner is broad. It can include:

• The legal owner
• Anyone who has care or control of the dog
• A person temporarily looking after the dog

This means liability can extend beyond the primary owner in certain situations.

How to Reduce Your Risk as a Dog Owner

While liability cannot be eliminated entirely, responsible ownership can significantly reduce risk.

• Always keep your dog leashed in public
• Invest in proper training and socialization
• Supervise interactions with strangers and other animals
• Maintain secure fencing or containment at home
• Ensure your insurance policy covers dog-related incidents

Final Thoughts

Dog ownership in Ontario comes with more than companionship. It carries serious legal responsibilities. Under the Dog Owners’ Liability Act, owners are held strictly liable for injuries caused by their dogs, whether to people or other pets.

Understanding these risks is essential. As emphasized by Deutschmann de Koning Personal Injury Law, being informed about liability laws can help both prevent incidents and protect your rights if one occurs.

Before bringing a dog into your home, or if you already have one, it is worth considering not just the rewards but the real legal consequences that can arise from a single unexpected moment.

About Deutschmann de Koning Law

Deutschmann de Koning Law serves South-Western Ontario with offices in Kitchener-Waterloo, Cambridge, Woodstock, Brantford, Stratford and Ayr. The law practice of Robert Deutschmann and Nick de Koning focuses almost exclusively in personal injury and disability insurance matters. For more information, please visit www.ddinjurylaw.com or call us at 1-519-742-7774.