I do believe that my snake was hatched in October, because she was about 12 or a little less than 12 inches when I got her in November. Right now she's about 19 1/2 inches long. I'm starting to put her on two pinkies now, well unless some of the pinkies are rather large because occassionally they'll give me these really big sized pinkies, then that's when I only feed her one, but if it's two small ones I give her two.