Barkham Asylum (DC Comics) by Yehudi Mercado

Jester is. Well, he wants to be. Maybe he is? He’s the Joker’s dog so of course he’s funny, but his sense of humor is about to be put to the test. Because when the super-villains of Gotham get thrown into Arkham, their henchpets go to the maximum-security pound known as Barkham Asylum.