One unaltered* cat will have a litter every 8 months. Each litter will contain between 4-6 kittens, half male and half female.

*unaltered: a cat who has not been spayed or neutered

Sheila is a feral female cat, at 8 months old she has her first litter

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8 Months Later

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Sheila has her second litter

Meanwhile the 1st litter has their first litter

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 Another 8 Months Later

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Sheila has her third litter

The 1st litter has their second litter

The 2nd litter has their first litter

The Results

44 feral cats have been born in 16 months.

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Sheila now has 12 children, 16 grandchildren, and 16 great grand children.

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*this is based on an average female feral cat, actual results may vary*