Clifford is not the brightest marker in the box, but he certainly likes to eat them (markers, that is. And crayons and colored pencils and Play-Doh). Both the dogs chew on small toys and discarded diapers/pull-ups (yes, ew, but normal), but Clifford's appetite for art supplies is uncanny. It's as if there is some artistic urge in his tiny brain, yet, in the absence of thumbs, his only form of expression is...consumption. Or maybe his poop is his art. It's certainly colorful.
Please bow your heads in silence to mourn the marker that died to give Clifford these green spots.