When they gain the fluid it always seems to be mainly in the midsection.  It usually makes their faces very gaunt since they are actually not getting the nutrients they need, despite the extra liquid.  You can tell this one is a piggy and has been for a while.  It even has fat in it's forehead and nose.  Maybe it put on even more weight from the kidney issues, but this sow is probably at least 250lbs if not more.