I remember drawing something almost exactly like this before (never uploaded mind you), same general positioning of characters/backgrounds. Except it was just two of my characters hiding out from a storm. A tornado-y storm.
Pivot was raised in a kennel not in the wild and has his collar and goggles from such because the overseer was an older woman and who caught him with them all the time and put them on his head as well as the collar around his neck.
The glow stick necklace was an old design from Pivot which carried over to the child between Pivot and Zan who make visits to the shelter where they got all their accessories from. Hence why Zan and Piv have the collars and the pup has the necklace.
I could give you the full back story if you'd like to take the time to note me and find out beyond looking at drawings without the back story fully explained in the description :3