I have a cat and dog.  I had a flea infestation so bad that I got bitten during my sleep all over - hands, feet, neck, body.  I thought it was mosquitoes initially.  I got this flea trap and placed it under my bed, and near the dog and did everything they said.  My animals were itching a lot all the time as I had run out of flea meds and vet was out of supply temporarily.