Dogs

In theory, a female can have up to three litters in a year with an average litter size of seven puppies. One female and her babies can theoretically create 67,000 puppies in six years.

Cats

The average litter of cats is 1 to 8 babies and 2-3 litters annually. One cat could have 100 kittens in her lifetime. However, her entire generation could include 420,00 kittens in seven years.

Rabbits

A female can have 1-14 babies in a litter starting at only six months old. Rabbits can become pregnant within minutes after birth. As their gestation period is about one month, one female could hypothetically give birth 12 times in one year, though the mating season is typically the springtime.

Based on the approximate seven-year life span of a rabbit, one female and her offspring could lead to nearly 185 billion rabbits in seven years.

Have you ever wondered why the Easter Bunny is associated with eggs? Even our ancestors knew the incredible reproductive potential of rabbits.