Plenty of reading if you are interested in the subject:
Thanks for the links. Interesting reading indeed.
+1.
People are generally bad at estimating speed and tend to overestimate.
There’s plenty of YT footage of bikers hitting things of that size (deer, for example) and usually doesn’t end well for either party. I didn’t see a mark on the bike in the picture.
No witnesses. I’d speculate that rider was giving it beans in a low (high-revving) gear so appeared faster than he was, the dog ran in front of the bike with unfortunate consequences, and the understandably upset owner presented his version of events accordingly.
Still doesn’t absolve the rider of much though, of course. Probably going inappropriately quickly even then, and failed to stop after an accident (you’re legally obliged to report killing a dog, if memory serves). I just don’t think it’s the ZOMG MANIAC DOG KILLER story it’s reported as.