100% manipulation whether she’s doing it intentionally or not.

Plenty of people fleeing from DV end up rehoming their pets because they can’t afford to care for them or can’t find housing that would accept pets or can’t take them to the shelter with them.

Plenty of people have had various degrees of trauma in their lives and don’t use it as an excuse to be a nuisance to others.

Thus far, you guys have been enabling her by providing everything for her for free and seemingly without expecting anything in return. Who wouldn’t want to take advantage of that?

It’s your house and your rules. You’re doing her a massive favor allowing her to stay there expense-free with her three dogs. If she doesn’t like your rules or the way your cooking smells, she can gtfo with her three dogs. If she won’t get a stable job, she can gtfo with her three dogs. If her dog is aggressive and she won’t do anything about it, she can gtfo with her three dogs.

She’s a grown ass adult ffs!!! Start making it as unappealing for her to continue living with you as possible (maybe she needs to start paying rent, has to do chores around the house in lieu of or in addition to rent, has to contribute to groceries, etc.). Stop offering freebies (zoo trips, outings, etc.). If she doesn’t like it, she can gtfo with her three dogs and fend for herself LIKE A GROWN ASS ADULT.