They eat insects, sowbugs and spiders. Moles eat insects and worms. A feral animal is a domestic animal which has been released or allowed to go wild. On Mount Diablo we have feral dogs and cats. Feral cats are seen along all roads in the state park.
Feral cats compete for food with native wildlife such as weasels, owls, hawks, and snakes.
Feral dogs occur in the Wall Ridge and Mitchell Canyon areas. Pet dogs which are allowed to run loose at night will come up into the park to hunt and kill wildlife and livestock. Many of the livestock kills blamed on coyotes are actually killed by dogs, then scavenged by coyotes.