I have an ongoing project to spay/neuter the barn cats. One cat got pregnant and had six kittens, normal here is one litter a year. I was waiting for her to quit lactating so that I could get her spayed. Before that happened, she was pregnant again and had her kittens last night. This time she had EIGHT kittens so this one cat has produced FOURTEEN kittens just this year! Needless to say, she is locked in a spare room and won't be allowed outside until she is spayed.