'Rock dog': Lab eats nearly 100 pebbles By Vickie Ilmer FOX 13 Seattle Published February 26, 2013 3:31 PM PST Share Copy Link Email Facebook Twitter LinkedIn Reddit Published February 26, 2013 3:31 PM PST article A couple in England couldn't figure out why their dog was making a rattling sound. A quick trip to the vet revealed the labrador retriever had swallowed more than 75 pebbles after a day at the beach.