Had flea infestation so started a vet-recommended topical solution. The topical solution didn't appear to be working despite using it for 3 months along side flea traps in my house. Then I added this flea deterent.the cats love it!! After a month of use,their coats changed! Shiny and softer,and most importantly, no more fleas!! (As a side note, my friend takes vit B1 daily, and highly recommended that I start daily use of that vitamin supplement as a mosquito repellent. Bugs,bees,never bother he...