If you vacuum daily and put the bags outside in the trash immediately, and set some flea traps, that will get a light infestation under control without chemicals. It has to be a daily vacuuming though. The flea traps are merely night lights with a cake pan of soapy water set below them. The fleas are drawn to the light, jump in, and the surface tension of the water is diminished by the soap, so they drown. It DOES work, but not well enough to handle a heavy infestation, and ONLY in conjunction with flea treating your animals with Frontline. If they have a heavy infestation, you may want to ask the vet for Capstar first, as it will kill all of the fleas on an animal in 24 hours, then the Frontline can go to work doing prevention and you can deal with the environment where the fleas are originating. WITH chemicals.