Evil Lies You Told Your Siblings/Were Told

[Amaterasu]

We were dog-sitting a family friend's dog for a while, a fairly small breed that even an 11-12-year-old could pick up easily. Except that said dog didn't really like getting picked up, so my one sister told my other (young at the time) sister that if we pick the dog up too often she'll die.
One day my sister was walking this dog and it started to chase after a cat, dragging my sister along by the leash until they were pretty damn lost. Luckily the police found them and brought her to a nearby station for our mother to pick up. My sister told them to please not pick up the dog because she might die. The police was pretty confused.