The American cat population reached nearly 68 million in 1996. A cat's heart beats twice as fast as a human heart, at 110 to 140 beats per minute. The largest cat breed is the Ragdoll. Males weigh twelve to twenty pounds, with females weighing ten to fifteen pounds. The smallest cat breed is the Singapura.
Males weigh about six pounds while females weigh about four pounds.
Calico cats are almost always female. If your cat is near you, and her tail is quivering , this is the greatest expression of love your cat can give you. Cats wag their tails when it is in a stage of conflict. The cat wants to do two things at once, but each impulse blocks the other. The cat wants to go outside, but doesn't want to go into the rain.