I can't tell if you're being sarcastic - it's a pretty obvious trope to confuse how cute an animal is with how safe it is.

Edit: To be clear, I don't know what the statistics/literature on Chows say. I'm just remarking on "aren't they fluffballs?"

They tend to be protective breed like a cute Rotweiler. Seems harsh to label any of these breeds as aggressive when it stems from human behavior or deliberate training to make aggressive.