There could still be dragon bones and hides in the reward chest, kind of like dragon bones appear in the dom tower chest if you fight Elvarg before cashing in your dom factor.

Those can appear regardless of the bosses you fight.

 

And the Dom Tower isn't good for citing precedent considering lore wise it is the tower putting a bunch of stuff it's accumulated from prior adventurer's etc over the years in to reward you and nothing to do with what you have killed. Especially as what you kill is not actually real, it's just an apparition of your memory.

 

Better precedent source is Barrows, which does not drop any form of body/corpse part in the chest loot.

There could still be dragon bones and hides in the reward chest, kind of like dragon bones appear in the dom tower chest if you fight Elvarg before cashing in your dom factor.

Those can appear regardless of the bosses you fight.

 

And the Dom Tower isn't good for citing precedent considering lore wise it is the tower putting a bunch of stuff it's accumulated from prior adventurer's etc over the years in to reward you and nothing to do with what you have killed. Especially as what you kill is not actually real, it's just an apparition of your memory.

 

Better precedent source is Barrows, which does not drop any form of body/corpse part in the chest loot.

 

The point I'm trying to make is, people will expect dragon remains as a reward for fighting the Qbd, and since it's a chest, you can give hides/bones as a reward. Jagex could even tie it in to lore by saying that the chest contains scraps from failed dragonkin experiments or something.