Dh once brought home an injured staffy he had found by the road, collarless and lost. It looked like he had been hit by a car, as he had several abrasions, and a nasty limp.
It probably hurt him when dh picked him up and put him in the car, and when he got him out of the car and carried him in - and the poor thing must have been so scared - but he didn't utter a sound - not even a whimper. Tbh, if he had been growly and cross, I would have completely understood - he was lost and hurt and a stranger had picked him up - but he was a complete gentleman - such a lovely dog.
We reported finding him to the police, and handed him over to the SPCA (because he needed a vet's attention, and we couldn't afford to take him to the out of hours vet in Glasgow), and his owners were very quickly found - they rang the police, who put them onto us, and we told them where he was. They picked him up the same day - his injuries were minor and he was fine.
It turned out he had been frightened, when out for his last walk the night before, and had slipped his collar and bolted - and when dh found him, he was two or three miles from his home village.
He was a lovely dog - and if his owners hadn't been found, and he'd ended up with the SPCA, looking for a new home, I think we would have had him in a heartbeat.