What is the difference between a cat flea and a dog flea? The previous owners of our house had both cats and a dog and the house is infested. Will the cat fleas naturally die off with no cats around? Do we only have to worry about the dog flea population or can they both survive off dogs/humans? We’re currently treating our dog but I always question if its working. We also have had the house sprayed by a professional and have been vacuuming everyday. Would it be beneficial to send our dog to my parents and never let her in the house until we know the flea problem is over?