Outside the ring, not every group winner at the Westminster Kennel Club dog show is a good boy or good girl. At home, they’re rascals. Or escape artists. Or vandals, prone to snacking on cellphones.

Behind that perfectly coifed coat or underneath those long silky tresses is often a family pet who sometimes drinks out of the toilet.

Take Colton the schipperke. In the ring, Colton is everything his Instagram hashtag — #smalldarkandhandsome — says he is. At home, he is something else entirely.

“He’s a nut,” Colton’s handler, Crista Cook, said Monday. He’s also a trailblazer: Colton became the first of his breed to win the nonsporting group at Madison Square Garden on Monday night.