PLAINFIELD TOWNSHIP, Mich. (AP) — A 50-pound pet tortoise named Frank has gone missing in western Michigan.

Owner Bradley Clark says the female African spurred tortoise disappeared Sunday from his backyard in Plainfield Township. He says he thinks the 12-year-old tortoise escaped through a damaged part of the fence.

Clark says he followed his tortoise’s track through a neighbor’s yard, but lost the track after she had crossed a road. He tells WOOD-TV that he’s looking around the area, putting up photos and sharing his story online about the pet that he considers a family member.

The Grand Rapids Press reports the tortoise measures about 10-by-13 inches.