I saw my boyfriend's brother mistakenly eat a dog treat and didn't say anything
Was it for sure a dog treat?
I saw it with my own eyes.
You should have told him right away. Dog treats aren't made for human consumption and could make him sick.
I'm going to blackmail him. He is not going to tell him right away that he ate it.
You should have told him though! It is not nice to let people eat treats that were made for dogs.