Pets can have various impacts on wildlife, including predation, competition for resources, introduction of diseases, and disruption of natural ecosystems. Domestic cats, for example, are known to hunt and kill birds and small mammals, which can have significant effects on local wildlife populations. It is important for pet owners to be responsible and take measures to minimize their pets' impact on wildlife, such as keeping cats indoors, using leashes when walking dogs in natural areas, and properly disposing of pet waste.