Looking for an effective and still reasonably biocompatible agent, I came across this product. It does an excellent job against the house entrained fleas. Assuming you have your pets treated beforehand in order to avoid new cases of immigration. Many other (far more toxic agent !!!) have completely failed. This means was already at the first application resounding (long-term) success and the ingredients are fine. The smell perhaps a little reminiscent of vinegar, but passes quickly. Ingenious, simple, ecological, effective !!! Buy.