Girl Most Likely
A number of pet hermit crabs are seen; none come to any harm (the same can't be said of some food crabs that appear briefly as dinner). A barky German Shepherd shows up in one short scene.
Contains a scene that shows a large number of euthanized pets at a veterinary clinic.
When a tsunami approaches, a dog leashed to a tree on a beach breaks free and runs with a group of people. While we don't see the dog die, it is not with the few survivors who find shelter, implying that it probably drowned.
Cute street dog is friend of down and out lawyer. As bad stuff starts to happen to the lawyer you are sure it's not going to end well for the dog, but the dog survives the whole first season. :)
An orange cat belonging to the main characters appears throughout the film. It is never threatened and doesn't come to any harm.
Gone With The Wind
A horse is overworked during a long journey home and whipped until it finally falls down dead from exhaustion.
A dog gets shot but the bullet just grazes it.
The main character's dog, Barney, is threatened by a mean woman and tied up with Christmas lights by the gremlins but is not harmed and does not die. Gizmo, the friendly gremlin (mogwai), survives while a large number of the evil gremlins die. A few cats appear in one scene but nothing happens to them.
The grizzly decapitates a horse. A pet rabbit disappears during a grizzly attack; we don't see the bear with the rabbit so it's possible that the bunny escaped. The grizzly meets a fiery end.
Guardians of the Galaxy
As part of a game, two small lizards are caught and eaten by larger lizards. No harm comes to Rocket, the anthropomorphic raccoon. A dog appears briefly in a few scenes; at one point it appears as though it might've died in an explosion but it is seen alive a few moments later.