Yes. In episode 6 Connie’s dad chokes her replacement, a St. Bernard dog. And also at season 2 episode 5 a puppy gets hit with a hammer and more. If your sensitive to this, never watch this show.
In the episode "Daddy Issues" (Season 1 Episode 9) Connie has an "evil alter-ego" who is violent. Mirror / reflections are used multiple times. And a mirror does get broken.
It is a side story, and not the main focus of the episode.