That small of a size I would not worry. Nylabones say on their package that if they ingest a piece about the size of a grain of rice it will pass no problem. The Kongs are a similar material. If it were larger I would worry about a blockage, but the size of a pinhead is miniscule.
__________________  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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