Yeah, in high school a friend's golden retriever (who was very poorly trained and very happy to see me) knocked me flat on the ground and stood on top of me while chewing up my new suede jacket. Bruised ribs and wrecked jacket. I really like dogs, but it took me about ten years to be ok with any dog bigger than a corgi after that event.

Incidentally that dog eventually got taken away by animal services, they were mistreating it, sad but unsurprising.