If you allowed two cats and their surviving offspring to breed for 10 years you would end up with over 80 million cats! This is assuming 2 litters per year, which is certainly not out of the question, and 2.8 surviving kittens per litter. ( I have no idea where that number came from!) Cat overpopulation is a big problem. There are a lot of lovely cats out there that need a good home. Letting your cat have a litter just so your kids can have the experience or because kittens are just so darn cute are not really very good reasons. Do your part in helping to control cat overpopulation and have your feline friend spayed or neutered before they add anymore unwanted cats to our community.