Mini pig question

Question
I know you are not a vet but you hve answered questions for me before
and I was wondering if you could help me again. My piggy boss died. He
is 6 1/2 months old amd I have owned him for 7 weeks. He has always
been very healthy or he seemed to be very healthy. I went to let him out
of his indoor pen and he was laying on his side with his eyes open, he
couldn't move or make a sound. I thought he was died but after checking
him out I relized he was still alive, he started gasping and his back pegs
would move a little his stomach was moveing a little at times but not in a
breathing motion more like a hurling motion. His body would pant at times.
His eyes were watery. He died 30 minutes later. He was only in his pen
for 4 hours prior to that he was running around like his normal self. We
have not switched his food or anything everything has been the same
since we have got him amd Im positive he didn't get ahold of anything
poisones as we have none in our home. Pretty much just wondering if you
have ever heard of anything like this. Thanks you for your time.  

Answer
The only way to know for sure why he died is to have a necropsy on the body. Without the information from a necropsy, all anybody can do is guess.

Pigs are very good at hiding symptoms. Sometimes, the first sign of a serious problem doesn't appear until it's too late. In older pigs, deaths like this are often due to a cancer of the face, lung or throat. In younger pigs, it's often something they were born with, like a heart defect.

If he was going potty ok, then it's probably safe to rule out bowel or bladder problems. If the temperature was unusually hot or cold, that could be the problem. Pigs can tolerate a wide range of temperatures, but they are not good at going from a hot environment to a cold one, or vice versa. A pig that's used to cool weather can dye of heat if left out in 90 degree sunshine.

Those are the most common problems, but without a necropsy, there's no way to know or even make an educated guess.