While I have not been a prolific contributor on this case thread, I have been engaged.
Perhaps its time for a synopsis of theories on the table, launching off of
@Hercule Holmes' fine post ^.
And I have a new theory to add at the end, that I don't think I've seen here before.
This is in NO particular order... and NONE of these theories have public facts to support them, so they are just best guesses.
1. Gus
wandered far from the homestead and his remains are on the property somewhere (deceased).
2. Gus is stuck and trapped somewhere on or
very near the homestead, possibly inside or outside of his house (deceased).
3. Gus was
abducted with malintent by a visitor, passerby, burglar, or someone who targeted the young lad (deceased or alive).
4. Gus
ran away from the homestead, got lost or held firm to his hiding position, succumbing to elements / animals (deceased).
5. Gus was accidentally
hit by a vehicle or had
a fatal accident on the property or homestead and it was covered up (deceased).
And my theory, FWIW, perhaps with wishful thinking at this point...
6. Gus was
taken into hiding by a family friend or member to protect him from something, real or imagined (alive).
Please feel free to add to this list, digest this list, or ignore this list.
IMO.