Soo sorry. I know how you feel. My dog was killed by a car. Big SUV. The car hit him (he yelped) & kept going, ran him over and all you heard was thump, thump.
I wish the impact of him hitting his head on the car or cement just killed him instantly and not having to feel the pain of beinging ran over!
When I saw him. He had no wounds, he just began to bleed from his nose. And he was just this tiny small 12lb dog.
SOrry for your loss, RIP CARARABET.