In the second scene of the film, several zombie dogs are killed on screen. Scene begins when the main character gets knocked unconscious, & goes to about 14 minutes in.
Resident Evil 3 Extinction is SAFE. Nobody v***ts. There is a moment, around 01:07:00 that a character who has been bitten in the arm is seated in a rock, in the desert, and starts to cough and gags a little, but they only spit. There was mildly triggering, but nothing actually happens in the whole movie.
Mixed ending. A few survivors get on a helicopter headed to a hopeful safe zone, while the lead character ends the film with a promise to attack the enemy corporation with an army.