A homeless trio's dog is sent off into the darkness where the werewolf is, but I dunno if it gets eaten or not considering we don't see its ghost later on.
Not torture so to speak, but the first transformation sequence does involve a lot of screaming and someone being in extreme pain, which is possibly worth mentioning in this category.
In the last quarter or so of the movie, there are some people and their dogs sitting around a fire pit. The holes in the sides of the firepit bin are triggering. Is only there for a scene or two.
Technically speaking, no character in the film dies via suicide. There is a lot of suicide talk, however, as the protagonist is constantly told to kill himself and is even given methods of doing so. There is also a suicide attempt scene, where he tries to cut his wrist inside a phone booth but fails to go through with it.
There is lots of blood and some pretty knarly body horror. The worst of it, imo, which is the main transformation sequence, happens from 00:59:20 to 01:01:15. Lots of hair, disfigured limbs, audio gore, you name it.