Hamster Catcher?

Well about 30 min ago I put my hamster in her ball and let her roll around i went to go clean up a mess and i left her in an area where the dogs couldnt touch her (or so i thought). When i come back one of my dogs is staring at something in the room shes not supposed to be in. She was staring at an EMPTY hamster ball. I freaked out thinking oh no what if my hamster was eaten by my dog so i frantically look under the couch and under magazines and i go into another room and see her right by the couch and i was able to scoop her up and put her back in the cage. Hopefully that will never happen again!