My elderly dog collapsed and died about 40 minutes ago. We think it must have been a heart attack. He'd just got back from a walk - my husband was taking his shoes off and I was in the living room, when the dog let out an awful, high-pitched yelp. We rushed to him and found him collapsed - my husband took him on his knee and we were stroking him and saying his name, but there was no response and a few minutes later he stopped breathing. There was nothing more we could do. We are both terribly shocked. He was fine and acting normally all day - he'd had a heart murmur for several years but it didn't appear to trouble him. We knew he wouldn't last forever, but we have never been in this position before - all my previous pets have had slow illnesses and ended up being PTS which was heartbreaking, but we were prepared for it. I feel very shaken and I can't stop thinking about his body, which we have put in a box until we can see the vet tomorrow to arrange his cremation. Please can anyone offer me some wise words - I just can't take it in that he is no longer here.