My Miniature Yorkshire Terrier Dog chewed on a Crayola Marker (Neon Blue) one time. He broke through the plastic and was chewing on the sponge. It was a fairly new marker mind you...

Every morning my mom would pooper scoop his poo so that it would keep the yard clean. Sometimes it was a bit hard figuring out where he did his business since he would kinda run ahead of her and go in the tall weeds. The morning after he chewed the marker, when he did his business in the alley in the weeds, she had absolutely no problem locating the bright blue poo in those tall weeds.

He got teased a lot for that