When it comes to fleas, you should always be “concerned”.  As you know, flea problems can be a nightmare. To avoid another fiasco, get some FLEA TRAPS set up. They’ll work for you night and day and no doubt will catch fleas way before a full blown problem gets established. That being said, if you’re only finding 1-2 fleas in the trap per month, I would follow the treatment schedule you’ve been on. 1-2 fleas would be “normal” for any pet owner – especially during flea season – and finding a flea on any pet that goes outside doesn’t mean you’ve got a new situation that needs treatment.

But if you “all of  sudden” noticed 2-3 fleas in one week, I’d consider doing something. Surges are usually a sign something is developing inside the home. Since you’re pets seem to be protected, its not likely they’re dropping healthy flea larvae or eggs. That means if something was to develop in the home, it would have to be happening in an area you’ve not treated. And several flea traps set throughout the home will no doubt help to alert you should a new problem start to develop and based on what flea traps capture the fleas, you should be able to isolate the area needing treatments.

Here are direct links to the information and products listed above:

Flea Traps:  http://www.bugspraycart.com/traps/electric/flea-trap

Flea Control Article:  http://www.flea.net/flea-control

Flea control is all about egg control as explained in our FLEA CONTROL ARTICLE. Once you understand what is happening, you should understand that using either the FLEA GRANULES or the PERMETHRIN with NYLAR will be required. And based on what you’re describing, I expect you’ll have to treat 2-3 times to get rid of them once and for all. FLEA TRAPS will probably help too since they get flea pupae to hatch out that much faster.