Leather doesn't bark when you get to the door or greet you. So you always know when something's wrong She will sit with her head bowed, and when you approach her she will lay on the floor and squint.

Timber isn't as smart as Leather. She doesn't even know when she does something wrong, until you point it out to her. Then she will run away with her tail between her legs and won't come to you when you call her. She will also run away when you try and catch her She opens her mouth and makes a big grin and her lips quiver when she feels guilty

As far as hiding goes though, they don't do that