Beautiful man, that's how the law of attraction works.
icicle just believe in a thought/incident that you want to happen with so much faith that you can imagine and video of it happening in your mind. (You get me right?)
Your pet is absolutely fit I saw the video, you better believe that too, and take him out for long walks twice a day, especially early in the morning.
Walks? Ajax.. The little so-an-so escaped for the 15th time at Halloween! The whole family is getting fitter with these 'walks' -or as I prefer to think of them 'forced marches' - around the neighborhood

One time it was 6 am in the middle of the sort of thunderstorm you only see in Georgia. I was barefoot, half-dressed, soaked and freezing and everyone else had given up and gone home while I'm still tracking him through woods and shit with critters in it I've never even seen before, and snakes, then through every back yard (way for the crazy English lady to meet her neighbors for the first time) while Herbert was having quite the adventure.
Those days are over
before I'm the one dropping dead of heart failure. He has an electronic tracker now.
Well make that a habit and take him out for long walks twice a day if you want him to live happier and longer. I suspect heart blockage might be due to less physical activity of Buddy.
Also you should learn "Reiki" from a local practitioner and heal him with it by touching him with your hands half to one hour daily.