Started using Frontline Plus 6/12/10. The label states that it kills fleas, flea eggs, and flea larvae for up to 6 weeks. It also states that it prevents development of all flea stages for up to 6 weeks. Noticed lots of flea eggs and fecies on a glass top table the cats like to lay on during this first treatment period. On 7/11 I swepted some flea eggs and flea dirt from the table into a petri dish to see if the eggs would hatch. Like a fool I administered a second topical dose at the recommended 4 week period on 7/12. I called the company... read full review »