I am a registered nurse, also, and I hate the sight of blood! :) Here is my point and it is not personal to you but for consideration by readers of this forum.
We live in a world where headlines can be made around the world because a McDonald's manager killed a rat in front of children.
Where other children can play graphic video games (paid for by their parents) constantly - gaining skills usually taught to soldiers.
Where other children shoot each other for a crossed look (in my hometown.)
I just think we do not do ourselves any favors when we try to pretend reality can be hidden.
Apparently in New Zealand the photo of the dog caused a lot of reaction. The actual man that the dog was grieving was not as memorialized as the dog.
Pictures of blood and mahym and death and gore simply for shock effect is offensive. Pictures of blood, mahym and death for the effect of showing the terror of evil men to the world is appropriate.