Dog brought fleas in. She received multiple baths, was already on Frontline, changed to a flea collar, sprayed the house, washed the rugs, etc. Still had fleas!!!! I decided to forget doing all that again and set this out in her area for about a week. Easy to see what your catching and that was a lot of fleas! Took care of the problem with this flea trap and her new flea collar. Forgetting all that hard work and expensive stuff if this ever happens again.