As diehard fans already know, the DJ famous for wearing a mouse head is actually a total cat person. Deadmau5 (real name Joel Zimmerman) popped up in the comments of a fundraising post by the Humane Society of Oakville, Milton & Halton. The Instagram post came after the Ontario-based non-profit rescued 27 cats from a single residence around late May 2026. The cats had never received veterinary care, and ranged from three months to three years ol…