Lobster shells are very sharp, and I doubt if chewed and swallowed that it would be chewed up so small that it would not harm a 10 wk old puppy. Bones can shells can cause internal bleeding, and even death. Please go to the vet for xray.
__________________  The T.U.B. Pack! Toto, Uni, & Bindi
RIP Lord Scrappington Montgomery McLimpybottom aka El Lenguo the Handicapped Ninja 10-12-12 
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