My puppy swallowed an earplug????

[musk03]

This afternoon, in the blink of an eye, my new puppy, a maltese-poodle (8 weeks), swallowed an orange foam earplug that was dropped on the floor! We live out of town, so I phoned the nearest vet, and he said to feed her lots of bread and water and to keep her active at it will probably pass within 24 hours. I'm still worried......