Pet dogs let a bull and a horse into the house

[Catherine]

While a man was out, his dog opened the back door and let a bull and a horse into the house. They were a bit rowdy and made a mess. One of them even drank out of the fish tank.

https://www.ctvnews.ca/world/article/pet...australia/

So much for being a guard dog. Instead of protecting things, the dog actually opened the door. 
It was a big bull and a big horse. Even just walking around, they would do damage.
I guess it was lucky that is was just a bull and a horse. The dog would have let anyone in.