Dog Bites and Animal Attacks – Facts & Figures in Illinois

What Makes Dogs Aggressive and Dangerous?

An estimated 4.5 million dog bites occur in our country each year, according to the Centers for Disease Control and Prevention[1] (CDC). Statistics show that young children and elderly adults are the most common victims of these attacks – perhaps due to their inability to fend off or evade an aggressive dog.

Why do dogs bite?

The American Veterinary Medical Association[2] (AVMA) took a close look at this question and identified several reasons why dogs may become aggressive and dangerous. Those reasons include:

  • Stress – If a dog senses that a person is invading its space or territory, the dog’s stress level may quickly escalate. The dog may react by biting the person.
  • Fright – A dog can also lash out if it becomes scared or startled. For instance, a dog may attack if it senses that its bed, toy, food, puppies or owner are being threatened.
  • Illness – Like humans, dogs have days when they simply are not feeling well. A dog may react by biting a person who won’t leave the dog alone.
  • Playfulness – Have you ever seen two dogs playing with each other? They may roll around on the ground and nip at each other’s ears. If a person tries to play with a dog in the same way, the risk of being bitten certainly goes up.

The American Society for the Prevention of Cruelty to Animals[3] (ASPCA) also examined why dogs attack. The ASPCA identified factors such as:

  • Heredity
  • Early experience
  • Lack of socialization
  • Inadequate training and supervision
  • Sex and reproductive status.

Interestingly, the ASPCA reports that intact male dogs:


What Are the Most Dangerous Dog Breeds?

It is a widely held belief that pit bulls are the most dangerous breed. In fact, the website,[5], is dedicated entirely to this issue. The site suggests that hard facts support concerns about the risks posed by pit bulls.

According to the site, the City of Chicago Commission on Animal Care and Control reported that, in 2012, pit bulls and their mixes accounted for 44.3 percent of all reported dog bites in the city – the most of any other breed.

Several years ago, the CDC released a study that analyzed data from a 20-year period in order to determine which dog breeds are most often responsible for deaths[6] in our country. Can you guess which breed topped the CDC’s list?

Human Dog-Bite Related Fatalities

Pit bull9820118
German Shepherd241741
Wolf-dog hybrid01515
Mixed breed04747
Chow Chow81321
Saint Bernard718

Note: Figures represented reported fatalities from 1979 to 1998. When multiple dogs of the same breed were involved in a single incident, the CDC counted each dog individually. The CDC calls this a “dog-based approach.”


Which Cities Have the Highest Number of Dog Attacks?

While it is difficult to find a tally of the total number of dog attacks that occur in cities each year, the U.S. Postal Service[8] (USPS) does provide an annual report on the number of attack that its employees suffer. In this sense, the USPS report can give us an idea of the cities where dog bites most frequently occur.

According to the USPS, during 2015 alone, 6,549 of its employees suffered dog attacks, or an average of 18 per day.

Houston had the highest number of attacks in 2015 with 77, or 14 more than were reported during the previous year. Chicago tied Dallas at No. 3 on the list with 58 attacks, marking a 24 percent rise from the year before.

2015 Dog Attack Rankings – U.S. Postal Service

City20152014ChangePct. Change
San Diego58471123
Los Angeles5675-19-25
Kansas City46321444
Columbus, Ohio43222195


What Are the Most Common Dog Bite Injuries?

Regardless of which breed attacks, a dog bite can lead to severe injuries that often require extensive medical treatment.

A study by the Agency for Healthcare Research and Quality[10] (AHRQ) found that, during one recent year, dog bites accounted for:

  • 316,200 emergency department (ED) visits (866 per day)
  • 9,500 hospital stays (26 per day).

According to the AHRQ, the most common injuries for dog bite victims (based on the number of hospital stays) were:

Diagnosis# of Stays
Skin / subcutaneous tissue infection9,500
Open wounds of extremities4,100
Open wounds of head, neck and trunk2,100
Fracture of upper limb500
Other connective tissue disease200
Infective arthritis and osteomyelitis100
Other injuries due to external causes100
Crushing injury / internal injury100
Fracture of lower limb100


What Are Common Dog Bite-Related Infections?

As you can see, infections and disease are serious concerns when a dog attacks. The CDC[12] reports that dog bite victims[13] should be especially concerned about the following:

  • Rabies – If the dog is infected with the rabies virus, the dog can spread the disease through its saliva. A victim needs immediate treatment, which typically consists of a series of shots. If untreated, the illness is usually fatal.
  • Capnocytophaga spp.—A human being – especially one with a weakened immune system – can readily become ill if this bacteria is spread from the dog’s mouth. An infection can lead to sepsis and related complications, including organ damage and dangerously low blood pressure.
  • Pastuerella – The CDC reports that more than half of all dog bites cause victims to be infected with this type of bacteria, which can trigger swelling in the glands and joints and make movement difficult.
  • MRSA – A staph infection of this type is highly common in dog bite victims. An infection can spread to the bloodstream and lungs and become life-threatening.
  • Tetanus – This is a type of bacterial infection that can cause a victim to suffer painful muscle spasms. It often results from deep bite wounds. The worst cases can result in paralysis or death.


What is Illinois’ Dog Bite Law?

If you are attacked by a dog, you owe it to yourself to look into your legal options for obtaining compensation for your medical expenses, lost income, pain and suffering and other damages.

In a dog bite lawsuit, what would you need to prove? The answer depends on where you live.

For instance, in 18 states, you must establish that the dog owner either knew or reasonably should have known that the dog had a dangerous propensity. This is commonly called the “one-bite rule.” It is based on a common law principle.

Illinois is not a “one-bite rule” state. Instead, dog bite claims in Illinois are controlled by a “strict liability” dog bite law, 510 ILCS 5/16[15]. Under the statute:

“If a dog or other animal, without provocation, attacks, attempts to attack, or injures any person who is peaceably conducting himself or herself in any place where he or she may lawfully be, the owner of such dog or other animal is liable in civil damages to such person for the full amount of the injury proximately caused thereby.”

So, to establish your right to recover damages, you do not need to show that the owner knew or had reason to know the dog could bite. Instead, you must prove three elements:

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