Living here in South Texas, I've found that these products are most effective when reapplied between 3 1/2 - 4 weeks. The products worked GREAT during the first 3 weeks but then towards the end of the 3rd week through about 4 1/2 weeks, the fleas would reapprear. This year, I've heavily treated the yards and so far haven't seen a flea...knock-on-wood.
I bathe my dogs once a week (unless they get nasty like roll around on something they shouldn't) but Frontline Plus is what I've found most effective with fleas down here. |