My dogs don't have fleas but I'm becoming paranoid that they'll get them. Even though it's common it just freaks me out because they're so hard to get rid of. So honestly, does anyone know the answers to some of these questions? 1. Can fleas live on humans? 2. If someone who has fleas in their home comes to my house, can they bring them? 3. Could my dogs still have fleas even if I have NEVER seen any on them?