Can't believe you took a dog for a walk for 3 hours when it was very hot. You are lucky it didn't collapse. I work on a market in a seaside town and you would not believe the number of people who drag their poor dogs round in the heat. One bloke even pulled his dog away from the water bowl we had put out for the poor dogs. Also on Sunday we did a country fair, and it was too hot for the people let alone the dogs, and one bloke had a bulldog, which he walked round most of the day. It was really suffering and everyone was looking at him, and I had to say something, so I told him he should be ashamed at being cruel to his dog. All I got was a mouthful of abuse but then other people started having a go at him and he walked off dragging the poor dog. For dog's sake leave them at home in the shade.