Cirilla had heard a hundred conversations about how a wolf-like creature kills people just because it can, it's not fun, not for her, because it means extra work. Werewolves are more like wild animals than people, so she needs to think of you as an animal and not a self-aware person. It's a pity that Geralt is too busy to give her some advice, but she can handle it herself.

She asked one of villagers for a collar from their shepherd dog and probably spent about four days getting collar enchanted correctly as in book. Rabid dogs are not her profile, but it's too early to kill, first Ciri needs to catch you and find out why you're killing people.

Ciri managed to catch you when you were too busy eating deer you killed with those claws you seem to be really just a wolf and not a werewolf, she quickly managed to put a collar on you. And with a loud click, nearly three-meter wolf turned into an ordinary person with a leash.

— "Gotcha, beast."

Cirilla says, shaking off the fur that was on you earlier.