Earth Animal Flea & Tick Program Yeast-Free Herbal Internal Powder Dog & Cat Supplement is an all-natural and organic herbal remedy designed to eliminate fleas and ticks from the inside out. This yeast-free powder is made with carefully selected wild crafted plant extracts that have been proven to naturally assist pets in battling common ailments. Simply add this powder to your dog or cat's daily diet to change the odor of their blood, making them unattractive to fleas and ticks. While the odor is undetectable by humans, Earth Animal's flea and tick remedy has received more than 20 years' worth of proven testimonials. Keep your pets protected with this safe and effective herbal supplement.