I thought he tortured and killed cats and dogs then put their heads on a pike/stick
He didn’t torture animals. He just used roadkill. I see online there are places saying he did but they are incorrect. He himself has said he did not torture animals only used roadkill.
I know it sounds crazy to take the word of a ‘serial killer’ but Dahmer was very truthful about everything. Even people who knew him and his father said he did not torture animals only picked up that which was already dead and dissected or dismembered them.
He did put a dogs head on a stick but that dog also was from roadkill.
https://www.seventeen.com/celebrity/a41464937/jeffrey-dahmer-dog-monster/