The flea and tick preventives are chemicals that you put into your dogs blood stream every month! Chemicals injected into your pets blood stream compromise with their vital organs, including the liver, kidney and thyroid. Recent research suggests that the toxic effects lead to a 25% reduction in life expectancy in those animals treated, and inevitably to a painful and premature death. Pets treated with such toxins also experience nausea, nervous disorders, sleeplessness, flaky skin, scabs and other uncomfortable effects created by a compromised immune system. Holistic veterinarians and other pet professionals suggest using an all natural flea prevention products.