Identification Mole droppings are small, pellet-like, and typically brown in color. Though moles spend the majority of their time underground, their feces can appear aboveground. Typically, homeowners find small piles of these droppings near surface runways, which are dead strips of grass that result from mole tunneling. Are Mole Droppings Harmful? Overall, mole feces is not harmful to humans, pets, or yards. There are no infectious diseases humans can acquire directly from mole droppings. However, the pests themselves may have ticks that carry Lyme disease, and finding mole poop in yards is a sure sign of in festation. The removal of these pests can eliminate danger, as well as stop landscaping issues, such as loss of grass and death of plants, from occurring.