Kittens have baby teeth, which are replaced by permanent teeth around the age of 7 months. Cats purr at the same frequency as an idling diesel engine, about 26 cycles per second. Domestic cats purr both when inhaling and when exhaling. The cat's front paw has 5 toes, but the back paws have 4. Cats step with both left legs, then both right legs when they walk or run.
Cats walk on their toes.
A domestic cat can sprint at about 31 miles per hour. The heaviest cat on record weighed 46 lbs. A kitten will typically weigh about 3 ounces at birth. The typical male housecat will weigh between 7 and 9 pounds, slightly less for female housecats. Cats take between 20-40 breaths per minute.