i'm 8 wks pregnant and my cats are dropping fleas everywhere. have done the frontline but the main problem is the house. i'm really worried about toxic sprays and flea bombs because i'm in the first trimester. on the other hand, it can't be good to be drained of blood every night by giant vampire fleas. does anyone know if they are harmful? what should i do? (i also have two dc's so spray is really not a good idea unless it's natural...)