I used to imagine that if someone's arm or leg was cut off it would look like baloney or salami inside. No bone down the middle, no muscle structure, no bleeding -- just solid homogeneous meat.
I still liked eating baloney, as I knew it didn't come from people! Oddly enough, I can't remember imagining that other animals were made out of baloney inside. We lived on a lake and caught and ate fish all the time, and I would help out in the kitchen when my mother was roasting a chicken, so I did know that there were bones and muscles and things inside of animals.
(When someone finally explained to me that hot dogs and baloney were usually made of the bits of meat that nobody wanted, like guts, I didn't care -- I already liked eating chicken hearts.)
A childhood belief about general

others believed things like this
- I thought that eating chicken gave me muscles (chicken and muscles sound the same in Mandarin).— NG
- I used to think that artichokes were animals because my mother said we were eating artichoke hearts. Anon
- When I caught chicken pox, I thought it was down to me eating too much chicken.— Helen
- that fireworks were animals with bombs inside ang when it exploded it was dead bits of rabbits— lala
- When I was six my sister told me Meat Pies were made from mashed up rats...to this day I can't eat a Meat Pie.— Jamie
- I used to believe that if you buried a chicken bone in the backyard it would grow a chickenAnon