I Hit A Squirrel

.....and it died. And I am so sorry. I saw the squirrel run out into the street as I was approaching and I came to a stop. It was a neighborhood street and there was no other traffic. I waited a moment, didn't hear or see anything and then proceeded slowly. Then I heard it. Thump. I was so hoping it was a rock or something but out of the rear view mirror I saw it. Just lying there. I've never had this happen before. With sadness, I just kept going. And now I feel terrible.