I thought strictly speaking porkers are up to 60kgs. We just send our GOS boars off at 6 months without weighing them, and they're always entire.
If the problem was boar taint, there would have been a strong urine-like smell. Then I thought that the meat would have been rotten, but that would have stank even more. So no idea, I'm afraid...
We normally get the heads, trotters etc back. They also let us pick up the carcasses, we put them on a new shower curtain in the boot of the car, covered with a clean sheet. But then I suspect not everything is done as it should where we went to. We're changing to a new abattoir in 2011, we'll see how it compares.
It's not unusual to see some hairs still, though. Just not a rug full, if you know what I mean. We recognise our pigs by their spots as they're all GOS.
What a shame you can't eat that meat! The pigs have died for it, after all.