PETCO Indoor Formula Cat Litter contains a special additive that literally attracts cats to the litter pan, which can help beat litter pan aversion in training your cat to start and continue using the pan. The special attractant formula can also help previously outdoor cats to adjust to their new life indoors. With a fresh indoor scent, the power of baking soda to control odors, and a special anti-microbial additive to control the growth of odor-causing bacteria, PETCO Indoor Formula Cat Litter will provide customers with maximum litter box odor control.