Is it time to start calling out bad cyclists?

The dog was trying not to run, and it was 5pm in london fields.

= hundreds of shit cyclists coming the other way making stupid overtaking maneuvers and looking at their phones., dog too pissed off to avoid them, my heart was in my mouth,

I can't judge the mood of dog the from behind but in principle it looks ok, the path is wide and straight and there isn't too much traffic. If he's riding too fast for the dog to keep up then ok, he's riding irresponsibly. I didn't see it or an familiar with the path but in principle riding with a dog is ok as long as the dog is well trained and used to it i.e match your pace and not dart at things or across your path. I have a terrier at home I ride with at home and he's superb with the bike.

I'd also say riding fixed is superb for riding with a dog, as your control at slow speed is so much better.