Bugs Mom, the vet thinks he may have aspirated, but I don't know. He was looking very poorly for no real reason I could tell. His eye was weeping in addition to the swollen foot. I attributed that to not being able to groom himself, but you never know. He also smelled funny. I couldn't tell you how, but I held that baby for many, many hours. I know the smell of him and his poo and his pee and he smelled different yesterday and today. I think he was probably very sick. I know he wasn't a young pig, between 5 and 6 years old. I'm not doing a necropsy. He'll be buried in my parents' yard this afternoon.
Thank you for all your thoughts everyone. It hasn't really sunk in, but maybe in my heart I knew it was coming.
- You can quote me
My best guess: kidney decline, then acute heart compromise. I seriously doubt he aspirated anything ... it's possible, but the foot swelling sounds more to me like an immediate heart problem.
Both of these come with age and there is absolutely nothing you could have done ... except what you did. Hold him, and let him know he is loved.