Like most parents, Kirsty Flann didn’t know her Russian blue cross Thumper Gypsy Mae was pregnant until a few days before she gave birth. Then she was shocked at the size of the kittens: weighing just 25g each and measuring a mere three inches long. 

Even though these kittens are smaller than mice, they’re growing. Hopefully they’ll reach normal size and live a long and healthy life. This just shows that you can never trust your cat not to do something behind your back, just like a teenager might do.

To learn more about a cat giving birth to the smallest kittens, click here.