Zombie Cat

The other night I dreamt that I was at my parents' house, and my childhood cat Beanie showed up in the backyard, apparently forgotten for years. His body was covered in moss and barnacles, and to my alarm there was a gaping hope in his side, through which I could see into his stomach (a dark hollow space). Although he seemed to be functioning despite the hole, I started freaking out about what I should do. Take him to the vet? Call my mom? Unfortunately, my mom was on the moon and unreachable by phone.