I've feed hogs that way , we would throw the carp in hole but had to open the gar up for them .
The big head carp I've seen were very oily ( comercial turtle trappers like them because of that ) and when a cut chunk of those carp hit the water you can see a oil shean on the surface and small beads of the oil will continue to come to the surface for quite a while .
I've heard they make good cut bait for blue cats also , not sure of that I haven't tried it ( I fish mostly for flatheads with live bait ) .