Got hanging weight on pigs. The sow is 245 pounds! That means she must've been bumping 500 pounds live weight! Sooooo glad I didn't keep her!! The boar's weight is 216.
On hogs you will find that the hanging weight is more like 2/3 the live weight as opposed to cattle that run closer to 50-60% of live weight. Hogs do not have as much gut weight, skin/hooves etc are less than bovine. I would say the sow and boar weighed in 400 and 350 weight range, by looking at the pictures.
She DID the pig slim fast... took it to the butcher for a kill shot followed by gutting and beheading... Lost 2/3 of her weight rather quickly is my guess.