A garment to reduce an animal's anxiety, fearfulness, overexcitement, or a combination thereof. The garment may include a central portion, flaps extending from opposite sides of the central portion, and, in some cases, a cinching member that extends from a central area of the central portion. The flaps may be fastened together around the chest and stomach of the animal, and the cinching member may be fastened to the central portion or one or more flaps to tighten the garment further, applying pressure to reduce anxiety, fearfulness, or over-excitement. Straps may be provided to secure the garment to the animal's neck. One material that may be used in making the garment is a fabric made of 55% cotton, 35% polyester, and 10% spandex. The animal may generally be any animal with four legs, for example, a dog or cat, or two arms and two legs, for example, a monkey.