There are pros and cons to every breed of dog, but it’s important to have all of the information before you commit to taking care of a furry friend for the next 10 to 20-ish years. Doing your research ensures that you’re getting a pet that’s well suited to your lifestyle.

Keep reading to find out which dogs don’t do so well in small spaces, which aren’t so tolerant of children, and which need a lot of exercise.

4Greyhound

Greyhounds were bred for racing and they’re known for their incredible speed and energy. In fact, they can exceed speeds of 40 mph! Greyhounds are gentle and intelligent, and very affectionate with their family.

One aspect that owners might have trouble with is that if let outside off-leash, this dog breed has a tendency to take off running, which can be dangerous with street traffic. It’s recommended that owners have a backyard fence with a minimum height of 4-6 feet to prevent a Greyhound from jumping the fence and running into the street.