There are no 100% hypoallergenic dogs. All have at least some hair which can attract dander/allergens.
Hounds who hunt by scent include the Basset, Beagle, Bloodhound, English and American Foxhounds.
Most dogs have a double coat of hair. The undercoat provides insulation. The topcoat is guard hair.
Puppies begin getting their teeth when they are approximately 3 weeks old, and they are sharp.
Dogs are not colorblind. They may not see colors as vividly as humans do, however.
Puppies begin getting adult teeth when they are between 4 and 7 months old.
Some think the Shetland Sheepdog ("Sheltie") is a miniature Collie. It is not.
The Labrador Retriever was called the St. John's Newfoundland originally.
The Chow Chow has a black tongue. Others generally have a pink tongue.
Boxers get their name from striking with their front paws when fighting.
The heaviest dog breeds are the Saint Bernard and the Mastiff.
Though known for yodeling, the Basenji is considered barkless.
Dalmations are born white and gain spots as they grow older.
Dogs have approximately 100 different facial expressions.
Greyhounds can reach speeds of up to 45 miles per hour.
Of all breeds, Basset Hounds have the longest ears.
The German Shepherd is not related to wolves.
A dog's hearing is much better than his/her sight.
The tallest dog breed is the Irish Wolfhound.
The smallest dog breed is the Chihuahua.
Puppies are born both deaf and blind.
Puppies' eyes open within 10-14 days.
Puppies' hearing begins soon after.
Dogs are either left or right pawed.
Dogs discharge heat by panting.
Dogs sweat from paw pads.
A cat's front paw has 5 toes, rear paw has 4. Some cats may have up to 7 front toes and additional rear ones.
A cat's collarbone doesn't connect to the other bones, and is buried in the shoulder region muscles.
A cat has 24 whiskers. 4 rows on each side. The top 2 rows can move independent of the other 2.
Cats have 30 teeth. Kittens have baby teeth until the age of approximately 7 months.
Humans have between 5 and 20 million olfactory cells. A cat has about 60-80 million.
Cats can judge within just 3 inches the exact location of a sound made a yard away.
A cat's whiskers are capable of registering even slight changes in air pressure.
A cat has a special organ in the roof of the mouth which analyzes smells.
Normally a cat's pulse is 120-240 beats per minute. The average is 195.
A domestic cat can sprint at approximately 31 miles per hour.
A cat's brain is more similar to a man's brain than a dog's.
A kitten ordinarily weighs about 3 ounces when born.
A cat cannot see what is directly under his/her nose.
A cat takes between 20 and 40 breaths per minute.
A cat's field of vision is approximately 185 degrees.
A cat's normal body temperature is 102 degrees F.
Humans have 650 skeletal muscles. A cat has 500.
Domestic cats purr when inhaling and exhaling.
A cat's hearing is more sensitive than a dog's.
A cat uses whiskers for measuring distances.
Cat urine actually glows under a black light.
A cat's tongue has minute barbs on it.
A cat can be right or left pawed.
Cats walk on their toes.