1- Dogs are capable of undestanding up to 250 words and gestures, can count up to five and can perform simple mathematical calculations. The everage dog is as intelligent as two-year-old child.
2- Service dogs are trained to know when they are on duty. When their harness is on, they know it's business time. When you take it off, the pups immediately become playful and energetic.
3- Seeing eye dogs pee and poo on command so that their owners can clean up after them. Male dogs are also trained to do their business without lifting their leg
4- The wetness of a dog nose's is essential for determining what direction a smell is coming from.
5- Spiked dog collars were invented in ancient Greece and were originally designed to protect dogs throat from wolf attacks.
6- Dogs drink water by forming the back of their tongue into a mini cup.
7- Puppies are sometimes rejected by their mother if they are born by cesarean and cleaned up before being given back to her.
8- The phrase "raining cats and dogs" originated in seventeenth-century England. During heavy rainstorms, many homeless animals would drown and float down the streets, giving the appearance that it had actually rained cats and dogs.
9- The most popular male dog names are Max and Jake. The mot popular female dog names are Maggie and Molly.
10- In Iran, it is against the law to own a dog as a pet. However, if an owner can prove the dog is a guard or a hunting dog, this restriction doesn't apply. Muslim reticence concerning dogs is perhaps due to the fact that rabies has always been endemic in the middle east.
11- Dalmatians are completely white at birth.
12- A dog can locate the source of a sound in 1/600 of a second and can hear sounds four times farther away than a human can.
13- Dog nose prints are as unique as human finger prints and can be used to identify them.
14- It is much easier for dogs to learn spoken commands if they are given in conjunction with hand signals and gestures.
15- Dogs can see in color, though they most likely see colors similar to a color-blind human. They can see better when the light is low.
16- One female dog and her female children could produce 4.372 puppies in seven years.
17- The oldest dog on record was an Australian catlle dog named Bluey who lived 29 years and 5 months. In human years, that is more than 160 years old.
18- A person standing till 300 yards away is almost invisible to a dog. But a dog can easily identify its owner standing a mile away if the owner is waving his arms.
19- Dogs can smell about 1.000 times better than humans. While humans have 5 million smell-detecting cells, dogs have more than 220 million. The part of the brain that interprets smell is also four times larger in dogs than in humans.
20- Some dogs can smell dead bodies underwater, where termites are hiding, and natural gas buried under 40 feet of dirt. They can even detect cancer that is too small to be detected by a doctor and can find lung cancer by sniffing a person's breath.
21-Dogs have a wet nose to collect more of the tiny droplets os smelling chemicals in the air.
22- Dogs like sweets a lot more than cats do. While cats have around only 473 taste buds, dogs have about 1.700 taste buds. Humans have approximately 9.000.
23- Different smells in a dog's urine can tell other dogs wether the dog leaving the message is a female or male, old or youg, sick or healthy, happy or angry.