In this strip
, the dorky Maxwell is attempting to show his new muscles... Anyway, he's flexing his "biceps" there.
other, Kevin is sort of flexing his left arm biceps. Here
, that jerk hunk of Jata is posing for his beloved cat Sabrina.
Yeah, the Housepets! 5000 BC arc (you're 2000 years less wrong, SuperStar
) has some muscles, especially from Ptah.