Tools of the Trade for a Scribe? Just before their second birthday, many dogs have a coming of age Bark Mitzvah. Often they receive appropriate gifts like this plush squeaky Bark Mitzvah pen from Chewish Treats. Dogs love to mouth and carry the pen around while enjoying its squeak. Made of new materials. Double stitched for durability. Rubber squeaker secured inside. Packaged in a plastic bag.