Important Haircut: Bucky accidental putting some hair remover in his shampoo (Bucky meant it for himself) caused Rob to go bald for a while before growing his hair back shorter, soon after which he stopped wearing his Opaque Nerd Glasses.
No Respect Guy: His pets don't even believe that he's the one who stocks the "magic cabinet" with food.
Threat Backfire: Twice. His attempt to blackmail Rob into paying Bucky's debt ended with Rob threatening to call animal control and the second with him threatening to kill Rob and Satchel only for Bucky to not care and actually encourage him.
Black Best Friend: There is one strip that does mention his race; he and Rob are discussing some unknown incident of prejudice against him when Bucky interrupts by saying he's more of a "burnt sienna" and goes to look for some paint chips. The ridiculous interruption makes Joe laugh.