If left to her own devices, a female cat may have three to seven kittens every four months. This is why population control using neutering and spaying is so important. A cat is pregnant for about 58-65 days. All cats share certain characteristics that are unique to the cat family. Cats have five toes on each front paw, but only four toes on each back paw.
Cats have true fur, in that they have both an undercoat and an outer coat.
Argos or Argus, Ulysses' dog, was the only creature to recognize the Greek hero when he returned home disguised as a beggar after 20 years of adventure. Laika became the world's first space traveler. Russian scientists sent the small dog aloft in an artificial earth satellite in 1957. A dog can hear sounds 250 yards away that most people cannot hear beyond 25 yards. The human ear can detect sound waves vibrating at frequencies up to 20,000 times a second.