If you think this poses no extra risk than other inedible objects, you'd be wrong! Although the coins originally contained 95 percent copper and 5 percent zinc until 1982, after that the proportion changed.
Find out what pennies are now made of — and the danger it causes — when you read more.
After 1982, coins became copper-plated zinc, 97.5 percent zinc and 2.5 percent copper. Zinc causes kidney failure and damage to red blood cells and a pet (be it dog, cat or even bird) that eats just one cent can become very ill or die, if it's not removed promptly!