There's no way of knowing, I'm not doubting you Butcher, but since I don't know how big that fella or that dog is.
The hog pictured below, me and my good buddy josh caught a while back and though he was a flipping beast, we loaded him just the two of us. We're pretty hefty ol boys, but I don't know that we coulda loaded much more than 350 to 400 just the 2 of us.
Didn't bother weighing him but figured around 300. That's a full size truck btw and some other fella caught a WWT SCORING boar the same night and I believe the body on this one was longer according to scaling by the tailgate.