Honestly, it sounds wonderful -  he should have many years of a good life before he 'gets old'.  And, if they care about their birds like it seems they do, the end will be quick, and he will be providing them with a good meal.
 We are omnivores, after all, so while it is hard to think about that when they become pets/like family, it really is a natural thing.  In the wild, the young and the old/slow/infirm tend to be the first to be another animals dinner - either because they are smaller (chicks) and easier prey, or because they aren't as savvy, or, they are older/slower (though usually smarter!)