South Park already did it!

Haven't seen the movie, but based on reviews I see two south park episodes have similar themes. There must be more.

Animal lovers: https://en.wikipedia.org/wiki/Douche_and_Turd

Stan's horse randomly takes him to a PETA compound where he finds that PETA's members live with animals, practicing zoophilia and even interbreeding with them.

Free sentient animal, keep it in pool: https://en.wikipedia.org/wiki/Free_Willzyx

The boys learn that Jambu, whose real name is "Willzyx", will die unless he returns to his family's home on the moon. The boys rally some of their classmates to help them liberate Jambu.

There are several where the government is holding someone or trying to kill them, but I don't think they are similar themes.