The average consensus is that pigs are problematic animals to fly and unless you want complications at your destination, are better to avoid.
Also remember that it is often a problem, or not allowed at all, to offload dead animals at most international destinations/airports.
Muduckace is honest enough to share his experience and recommend to avoid. That has been mine also. When the effort goes tits-up nobody, not the shipper, receiving client, insurance believe or realises this peril, and all will blame the airline for negligence.
It is simply just not worth the risk to take the chance. Remember also - "The Swine Flew!"