When I was in college in the '70s, the guy up the hall kept a large black lab in his dorm room.
The owner liked to give "Grover" LSD. At the time, it was also a "thing" in the dorm to give people LSD without telling them.
Grover had a Jeckyl and Hyde personality. One second, he'd lick your hand, then a moment later try to rip it off.
Grover chased a number of people, myself included.
We called animal control who sent out a lone female with a length of clothesline to tie through Grover's collar. We told her that was inadequate preparation for Grover. She of course ignored us and wound up on the hood of her truck, trying to evade Grover.
We went to the school and told them to get the dog off campus. Simultaneously, we went to the owner and told him that the next person that Grover attacked would be the last... and that the owner's outlook didn't look too rosy either.
Grover eventually disappeared, although strangely there was sometimes a dog dish in front of the owner's door...