If you can't feel your cat's ribs, she's too heavy. According to the Guiness Book of World Records, the heaviest cat on record was Himmy, an Australian cat, who weighed 46 pounds, 15.25 ounces in 1986. The tiniest cat on record was Tinker Toy from Illinois. Cats love high places. They share this love with leopards and jaguars, who sleep in trees.
Domestic cats are essentially loners.
When placed in a group, they develop their own hierarchy. As long as there is plenty of food on hand, a cat can learn to share it's domain with other cats. Cats are more aggressive when they are not neutered or spayed. A cat that bites you after you have rubbed his stomach, is probably biting out of pleasure, not anger. An adult cat has 32 teeth.