Original title (FR): Le Procès du Chien (The Trial of the Dog)

April (Laetitia Dosch), an idealistic lawyer dedicated to lost causes, agrees to defend Cosmos, a dog that has bitten three people, leading to the first canine trial. She has no choice but to win the case, as otherwise, her unusual client will be put down.

https://www.themoviedb.org/movie/1056648-le-proces-du-chien