A protective garment for livestock, such as a horse, has a first portion and a second portion defining a planar sheet of material. The first portion substantially covers a left leg and shoulder of the livestock, while the second portion substantially covers a right leg and shoulder of the livestock. The garment can comprise a one-piece protective cover or a two-piece protective cover. In one embodiment, the first portion and the second portion are connected to each other by an attachment member extending across a back of the livestock. In use, the protective garment is sufficiently secured to the livestock to protect it from undesirable external elements, such as insects and sunlight, yet somewhat loose to allow the livestock to freely move while wearing the garment.