Specifically, I think one gets beheaded. It's considered in poor taste by the onlookers, but it happens.

A horse is killed by the impact of a meteor, and her flank is used to make a bib for a baby (For whatever reason)

In the very first episode of The Walking Dead, the horse that Rick rides to Atlanta is eaten by walkers. Then, in season 5, Daryl and Aaron are outside of Alexandria and a horse named Buttons is also eaten.

A horse commits suicide by jumping off a bridge onscreen. Multiple members of Bojack's family (father, uncle, grandparents) have died offscreen before the series starts.

Season 2 - Episode 8

2 horses are decapitated two-thirds into episode 4

When Ellie runs out to distract people from where Joel is, the horse gets shot in the head.

Horses feature, and like dogs and cats, they *can* die, but they can be prevented from dying.

Also in the second season a horse is thrown and sadly squished

In the newest season, AHS: Apocalypse, a horse dies in the first episode. It was shot in the head.

Horses are common in Skyrim and are almost always killable. (You can kill Shadowmere but she respawns at her death place after a while) and in Helgen, a dragon is shown to kill a horse in the middle of the town.

Characters are ambushed and their horse is shot in the head

A horse dies off screen

The Valkyries' winged horses are seen falling from the sky under Hela's attack.

SPOILER: at the end of the game when running from the Pinkertons with John, Your horse will get shot and subsequently die.

If you're not super careful you can end up getting the horse you ride one killed(though at one of the fairy fountains your horse can be revived).

A man jumps out of the body of an exploding horse. I believe the horse dies in the process.

In the tunnel created by Sloth at Fort Briggs, horses are killed.

In episode 4 and episode 8 In episode 4 horses are seen dead on the ground after a creature attacks a coach. In episode 8 a dead horse is seen before the opening credits.

Presumably if there were horses in the area, they were executed along with every other animal - wild or domesticated. There are no horse deaths, or even horses, on screen however. There is a deer or similar creature briefly shown as dead by radiation poisoning.

A horse gets spooked on a ship and runs off and drowns

There is a line that says “We have resorted to eating our horses”, but the presumed eating of those horses is not shown.

While the 2 protagnists of the story climb up to see the battleground early in the movie, there are a couple of dead horses. The camera get’s quite close on the horses and you can see flies fly away from the horses.

The horses of the Hun's died in the avalanche.

The act of decapitating the horse is not seen, but it's aftermath is.

First season: It's mentioned that the party's horses die in the first season when left unattended in the wild mountains. Second season: The party's horses are attacked and killed by monsters in a battle.

Horse, no. Mule, yes. I highly suggest fast-forwarding when the mules are on the cliff as per a previous user has said. :(

A sick horse is shot in the head in the 1st season.

One of the main characters is a horse veterinarian.