Foxtail is an annual grassy weed that is also referred to as wild millet There are three types of foxtail found throughout the US yellow, green, and giant Yellow foxtail is the smallest of the three types and the most prevalent in lawns They are tolerant of a wide range of growing conditions and can be found in both moist and dry soilFoxtails of the genus Setaria are summer annual grasses Yellow, Setaria pumila, and green, S viridis, foxtails consist of a complex of many biotypesYellow foxtail is found in the centralwestern region, Central Valley, South Coast, Mojave Desert, southwestern Great Basin east of the Sierra Nevada, and low elevations of the eastern Klamath Ranges, Cascade Range, and Sierra Nevada, up toFoxtail plants are a weedtype grass that can cause serious problems for dogs Flourishing in the summer months, these annoying weeds are designed to burrow, which can lead to pain, infection, and sometimes more serious issues They can attach to your dog's coat and burrow in