The dogs are intent on helping shield Sans from the world, or maybe Sans is intent on hiding from the world and they're helping. Either way, Papyrus barely starts to offer a hand before they're hobbling up and out. He follows a short distance behind, looking around and listening for some hint of what exactly they're checking... and they don't get all that far.

"S-Sans..." He crouches down, reaching a hand to rest on his brother's shoulder. Collapsing and rattling, in the open like this... If Sans did this back home, it was more in the privacy of his own room.

"Would you like to be somewhere else? Like, your trailer? Or mine??"

Lambert isn't in there all that often either, and he'd probably leave if it was an emergency. Which, this might be.