There is a mention of the fact that most dogs in the village have been killed due to the extreme winter and there being no food. It is brief and not on-scene.
One of the character's fathers is extremely abusive to her and her siblings, verbally and physically assaulting them, not providing for basic needs, and coming home drunk and then hurting them.
In a flashback there is a description of a cruel secondary character shooting squirrels for fun and toying with the bodies. There are also occasional mentions of animals dying during extreme snowstorms.
Wanda had many siblings who didn't survive infancy - it's unclear whether they were stillborn or died shortly after birth. It's not described in depth.