Mate i just read your post to my dog and he laughed. An 8kg carcass would be devoured with ease. Have given him bits of the guts before and he picks out the good bits and leaves the crap.Takes him a while on the heads of big fish but he is up for the challenge!! Pretty sure i gave him the head of a 6kg snapper a year or 2 ago which the only problem was keeping his little brother from it!