Hmmmm Hmmm. It can't be the puffy cheeked on either, since it's ears are laid back...
Ruling out claimed pups and denied pups, we're left with...sixteen possibilities.
Now....as of yet, Atwood hasn't done heavily edited pups, so we can, for the moment, rule out eggshell, horse, robot and seal, until Atwood gives us clues otherwise. Leaving us with 12 Pups (I'm not adding their pictures yet until I narrow it down further xD). Now with all the clues, as above, we can rule out this guy;

Since his ears are technically laid back. But I'll keep him in the running for now.
NOW I'm ruling out these guys based on guesses for different artists/I don't think they fit Atwood's Style.




So that leaves us with eight potential pups
Then this is our troll hint given; Is my pup mostly blue or mostly orange? Yes.
Which does mean it uses both orange and blue in the palette as a pup, I think. Which rules out these three;



With the other hint of the muzzle being a different color from the rest of the head, these two are the only options left from this long post.


So I suspect one of them is Atwoods
Edit: Also 85% think that tonight's growth is Solloby's