Japanese Beetles are a threat to plants around your yard, but they are harmless to your pets. Their chewing mouthparts are only built strong enough to handle the soft middle part of the leaves. In fact, they don’t even chew through the skeletal structure of the leaf leaving it in a lace-like state.  These chewing mouthparts are not strong enough to do any harm to your pet. If your pet would like to use the shiny scarab beetles as a tasty treat, they will be perfectly fine. Many who keep chickens are big fans of the beetles as a food source for their beloved animals.