Ingestion of a single penny minted after 1982 is enough to kill a dog weighing fewer than 50 pounds. That’s because pennies minted after that year have a copper coating but are almost 98 percent zinc, which is highly toxic to dogs. Lest you think zinc poisoning is uncommon, the Animal Poison Control Center (888-426-4435) reports more than 4,000 cases of zinc toxicity every year. Pennies are usually the cause. But dogs, being the indiscriminate eaters they are, also swallow other zinc-containing items, including batteries, staples, nuts and bolts, zippers, board game pieces, jewelry….
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