When I was about 4 or 5 I stepped on the neighbor's cat's tail and didn't tell anyone. The very next time I saw the cat, it was covered in bandages and had had surgery. Until I got to college I firmly believed that it was my fault that the cat needed an operation. I finally told my mother and even though I know it's not my fault, I still feel guilty.
A childhood belief about cats and dogs

others believed things like this
- We told our little sister that she had a long bushy tail and she fully believed us for ages!!Anon
- I believed that dolls could feel when I didn't love them, that's why I treated them well.Anon
- My great-grandfather firmly believed, and had me convinced, that SPAM was mouse meat. — texasblue
- The very first time I saw a globe (of Earth, yes) I asked where "College" was located.— Shade
- when I was a kid my neighbor told me if I picked my nose I would poke out my eye. I believe him. — Jane
- When I was 3, my neighbor told me she was a witch and she said Godzilla was going to step on my house.— Grayson