I am so very sorry for the terrible tragedy poor Peanut had to endure and for the pain & suffering you and your daughter are feeling still.
Our furbabies are so small & defenseless (though they think otherwise) & things like this is a worry always in my mind when I go for walks with mine. I usually try to take routes outside the neighborhood; there are just so many big dogs around.
(((((HUGS))))) to you and your daughter
RIP sweet handsome Peanut