I've posted before about a delicate age mine always happens around 2 and half, I keep records on all my pigs and found that teeth and general ill health happens around 2 in my case, Lavender was 2 and half when she died last week that was teeth causing an abcess etc, these are more common reasons but if you know your pigs really well you will notice them change , ie very quite off food and not themselves, Lavenders abcess came up over night practically, but as i knew she was not her self I was on to it, although I keep 37 pigs (now) I always know if anything is wrong,
my most recent deaths were ages
2 and half Lavender
1 and half Bear
2 and half domino
almost 8 squeak
2 years poppy
1 and half lupin
about 3 ( not really sure) daisy
I've lost 7 since last sept
I also find that is a bad time of year for losing pigs, I'm likely now to go months before any more losses
I also have ginger who has anal impaction and has had done so for about 2 years now and is coping very well, some people might say put him to sleep but why? all it takes is a quick squeeze and a hold of the breath for a second and he is fine again lol

one thing i will say if pigs have teeth problems they can and do lose weight very easily and quickly so make sure you are onto it.