In this 2013 photo released by Animal Internal Medicine & Specialty Services, meatballs believed to be poisonous are seen in San Francisco. San Francisco police are trying to determine what was put into cooked meatballs that appear to have been purposely scattered on the ground, sickening at least one dog. Police said on Friday that they had sent samples from the meatballs to a laboratory and were awaiting results. Investigators suspect they were poisoned. (AP Photo/Animal Internal Medicine & Specialty Services)
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