This product is the easiest, cheapest and safest way to prevent fleas. It can be added to food to make it easier to administer, rather than trying to push a pill down your pet's throat or putting a gel on their skin that can get messy and can irritate the skin. Topical products can be toxic as well. Capstar is pretty cheap, especially if you have multiple cats like me and my boyfriend. We've discovered that we can buy the dog-sized pill, cut it into the appropriate dosage size, and give it to our cats. We haven't had any fleas in the house since we've been using this product. You can get it...