Lamb... we live in the middle of nowhere and they still manage to find the road.... and drivers drive even faster out in the sticks 
I found Scruffy just moments after he'd been hit... he was the kitten the mother cat dumped on my doorstep first and he was my absolute baby. I was pregnant at the time and had a complete hysterical breakdown sobbing over his poor little body, he was only 8 months 
Then the next year I lost another 8 month old, a stunning little female tabby who'd I'd re-homed from a woman who has a colony of feral cats in her garden who she and he husband feed, spay/neuter, and generally take care of.... the mother was the only female she could never catch to get spayed. Tess was the sweetest cat, an hour before she died she was headbutting my pen off the page whilst I was studying and batting my face with her paw. Dp went out to do the coal and she followed him out, normally she'd have been back in in 5 minutes as she never left the garden so when she wasn't back in 30 we were frantically searching the roads.... we didn't find her til the next morning... the bastards next doors dog must have chased her as she was so far up the road (there is a special circle of hell reserved for people who let their dogs run loose imo)
And last month Scruffy's litter mate disappeared.... couldn't find him on the road so one of the hundreds of dogs/foxes/badgers might have got him, despite being a male he never went longer than 12 hours without checking in for some food... he the one on my profile with the white face... a complete dope of a cat but very affectionate and incredibly chatty.
It's the biggest down side of cats.... nine lives or not they seem to find endless ways to break your heart 