Kaytee Natural Timothy Hay is a natural product with no preservatives or additives, and because timothy hay is lower in calcium, it may decrease the likelihood of urinary tract problems. For chinchillas, guinea pigs, rabbits, and other small animals.Natural sun-cured timothy hayNutritionally fortified with no preservatives or additivesGreat for a variety of small animalsTimothy hay is a natural product and as such is subject to the whims of mother nature. It can range in color from green to a yellowish brown – but don’t fret! Both colors are nutritionally sound. In fact, brown hay is slightly higher in fiber than green, but this is the only difference. Since sun, rain and other weather conditions affect the color of the hay crop, color does vary.Ingredients: Natural Sun-Cured Timothy Hay.