UltraCruz Natural Dog Flea & Tick Spray, 16-oz bottle; Keep pesky insects from bugging your pupper with UltraCruz Natural Dog Flea & Tick Spray. This spray is crafted with natural essential oils to repel insects without harming your dog or the environment. It does not contain any harmful pesticides or chemicals and does not need to be rinsed off after application—simply spray and play. Paw-fect for use before you and your doggo head outside, this spray deters fleas and ticks using natural ingredients such as peppermint, citronella and rosemary. Your buddy is sure to appreciate the lack of bugs on his body at the end of the day.