I am in no doubt you WILL be able to get back to your animals etc. In fact, doctors encourage people who have had heart attacks to get back to their normal routine (within reason), My neighbour had a HA two years ago, very active man, always busy on his smallholding. Yes, he took it easy for a while, and got help with his fencing, and heavy jobs. But I have seen him up on his outbuilding roof re felting, out in the fields doing all sorts of jobs. He has changed his diet, etc. but his life goes on as before in respect of his farmiing, and other jobs.
My brother was in hospital a week, including having his stents put in. Been about three months now, and he is back at work. Just doing full time again now. Still going to physio, and says he does get out of breathe at times, but all in all, he feels ok most of the time.
So, don't think you will have to live a normal life, Gary.......focus on getting better and back to you outside life which you enjoy.