When September is suspended from their school, her sister July begins to assert her own independence. Tension in the family builds on holiday Ireland as a series of surreal encounters test the them all to their limit.
No but you do see the girls picking up worms from the ground and putting them in a jar of soil which is later broken so presumably some of the worms die.
Sort of depends... one girl cuts a small cut on the side of her neck with a knife. You see the whole thing so probably close enough to be relevant but it's not excessively gory.
SPOILER
You see the two girls shaving their legs in the bath after receiving bullying at school for having body hair. One girl accidentally cuts her thumb and the sister deliberately does the same to show it's only a small injury/solidarity. They then press their bleeding thumbs together.