Qualley and LaBeouf split shortly after FKA Twigs accused the actor of "relentless abuse" during their relationship.
In a revealing Elle profile, the musician said her ex-boyfriend told her that killing the animals helped him get into character for a role.
On the "Grounded with Louis Theroux" podcast, the musician detailed how the actor would wake her up at night to "accuse" her of "all sorts of things."
The director said she stands with singer FKA twigs and other women who have accused the actor of abuse in recent weeks.
The singer is speaking out about being "hurt emotionally" by Shia LaBeouf days after FKA twigs accused the actor of assault, battery and abuse.
“What I went through with Shia was the worst thing I’ve ever been through in the whole of my life," the musician said of her relationship with the actor.
It could make a Belieber out of just about anybody.
We didn't even think it was possible.
As the old saying about creativity goes, you can't break the rules until you know them. The same goes for culture. For a brand to employ culture effectively it needs to understand what 'codes' are out there, and which are most culturally salient in order to smash, break and combine them into something that is truly vibrant, new and culturally on point.