in freakshow, a chicken is seen getting it's head violently bitten off by one of the attractions

Season 3 - Dog dies off screen but can be heard Season 5 - Dog dies off screen and is found by owner, shows dog's body.

In Cult, a guinea pig gets put into a microwave.

Langdon kills animals as a small child and his grandmother buries them under rose bushes. Scene of bloody dead animals left as "trophies".

Several seasons have bugs

Perhaps the one animal/thing that is safe from American Horror Story

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

not sure why there are so many nos on this, there are multiple scenes showing and describing a character killing and mutilating cats

Coven

Heroin use is prominent in Hotel.

There is an addiction demon and heroin use

Season 2

Coven, by Delphine LaLaurie

In Cult, a man is hung from the ceiling with hooks in his chest, and another man has nails shot into his head. And there's a "haunted house" of sorts where real people are being tortured and killed.

A man burns his family alive in Murder House. A witch is burned at the stake in Coven.

Coven

Murder House (season 1) contains graphic scenes of Violet self-harming.

In season 5, there is an (imaginary) scene where Sally's teeth all break of and fall out, continued with blood.

In apocalypse there’s a scene that implies they’re eating a soup containing human flesh, I don’t think it was 100% confirmed

Drug OD seizure

there is forced amputation pictured in season 4

Roanoke

in asylum they mention non-consensual sterilization

Yes, Ben in Murder House (S1) and there are other references to affairs throughout the series.

there's various depictions of parents dying in varying levels of gore throughout the series

In “Murder House” episode 2, a teddy bear is doused with gasoline before the House is set on fire. We do not actually see it burning.

10.1 implies but doesn't show a woman killing a baby. You hear it scream and cry, and off screen the cry is cut off.

A couple gets kidnapped in hotel and trapped behind a wall

Seasons 4 and 6 have many clowns. Season 5 has a character briefly in clown makeup

It is mentioned that Kai stalks several people in cult

Oh yes. The devil possesses people in almost all of Asylum and there is a horrifying exorcism scene in the second episode.

Seasons 1, 3,4,5 and 6

Quite a few

The entire show is pretty much gore mixed with jump scares, mixed with a heavy helping of 'whaaaaaaaaaaaat?'

In Season 1 during a School Shooting

A person's friend shoves their fingers in her mouth after she overdoses on pills, and she throws up.

It's used in Asylum, for one person it is used as gay conversion therapy, and for another it fries her brain so much that she forgets her own name.

Many

There's an entire season.

“They don’t call me hypodermic sally for nothing” -Sally (hotel)

In Coven

Season 3

In season 1, Violet commits on screen suicide by overdose. It seems that she is saved by Tate but later episodes reveal her body being infected with flies.

Season 1 in particular has several scenes involving self-harm.

Season Seven (cult) has a major part about fears/anxiety and panic attacks

In season 1 a character accuses her partner of gaslighting her, but it is because supernatural things are happening to her that her partner doesn’t witness or believe. She is placed in a mental institution as a result, but her partner later believes her and apologizes.

autism is not specifically mentioned, but there are mentally handicapped characters that face discrimination and abuse in season 4

A woman with a phobia of being buried alive is locked in a coffin until she suffocates.

In Roanoke (season 6) there is

Season One - Episode 1 or 2, there's an entire scene that's based around strobe lighting

In seasons 1 and 6

The first two seasons heavily play on abortion and season 5 an abortion is shown

in season four, there's a scene with dubious consent involving an exploited birth of a child with a disfigurement.

In season 1 a character dies in childbirth.

throughout the whole series. the show depicts sex really often

almost every single season of AHS has some type of sexual assault in it

In Cult, a man tries to get his sister pregnant, which she doesn't want.

S4E2: two male partners are referred to as "fruits" and it is suggested by a character that they are sick and lower than "freaks".

In coven a person says the n-word

also racist words used by madam lalaurie

coven

In season 4 a lot of the freaks are being discriminated and there is ableist language used against them I think

not very many, only a few, and those are in AHS freakshow, where the fat women is that they call ima wiggles.

in season 2 there is a woman who believes she's anne frank and a n**i doctor. as well as flashbacks from Auschwitz

Deaths of two gay characters in Season 1 Death of a lesbian in Season 2 Death of two gay characters in Season 4 Death of two gay characters in Season 5 Death of a lesbian in Season 7

season 6

There is a trans woman in season 5 who is misgendered and an intersex person in season 4 who is misgendered

Santa is a rapist/murderer in Asylum.

most have bittersweet endings

There are car crashes in multiple seasons

Season 10 has the man saying emotionally abusive things to his wife and daughter, before he attacks his wife to suck her blood when she cuts her finger

All of Constance Langdon's children, all of the Countess' children, and many more Especially Kyle Spencer, that was absolutely nauseating

Yes. A lot. In every season.

There is a scene where a woman gets buried alive in cult, but it is a dream

There's a mass shooting in Cult "Midwestern Assassin"

In apocalypse that’s what the season is based on

A girl's head is held underwater until she drowns in Season 3.

A family is hung in season 4, but only their legs dangling is shown. Season 1, a man is hung by ghosts.

In a number of seasons there are the following: Drowning Trapped in tight spaces with no air Choking Throat slitting and the gurgling that follows Use of chloroform

adelaide is hit by a car and died in season 1