Cats have +100 sounds in their vocal repertoire,
The first cloned dogs, six Canadian Labradors, started to work for South Korea's customs service as sniffers in 2009.
Abraham Lincoln's dog,
In Switzerland, some people still regularly eat dog and cat meat. It's legal in the country.
Dogs were used as messengers in WW1, carrying orders to the front lines in capsules attached to their bodies.
The smallest living dog in terms of length is a chihuahua who measured 15.2 cm (6 in).
Dogs are as smart as a 2-year-old baby. They can learn and understand over 150 words.
Newborn dogs are born blind and deaf. Most puppies open their eyes and respond to noises after about two weeks.
Dogs have only recently been able to watch TV, since they need about 70 images per second, which older TVs couldn't deliver.
The "Territorio De Zaguates" (Land of the Strays) in Costa Rica is a huge no-kill dog shelter where you can hike for free with the dogs.
Dogs can tell when people are untrustworthy and will stop listening to a person if they prove unreliable.
There's a bridge in Scotland from which dogs frequently leap to their deaths, and no one knows why.
Despite Americans owning more than 78 million dogs as pets, only about 30 deaths per year are attributed to dog attacks, fewer than bees.
Lab tests have shown that cats don't love you the way dogs do. Tests has shown that a dog releases Oxytocin (the "love hormone") in their brains at much higher levels when compared to cats.
A study suggests that owning a dog reduces the likelihood of depression by 3 times in patients with HIV, which can result in improved patient adherence to potentially lifesaving antiretroviral therapy (ART).
Research has shown that dogs actually like the silly, high-pitched voice their owners use to talk to them.