There are a few things which can be done to deter fleas without pets.
Hutchinson says that some of his patients use cedar oil to repel fleas and ticks from their pets, mostly their dogs.
Apple cider vinegar is best used as a preventative measure in protecting your pets against fleas. And while there are plenty of commercial products available for killing and preventing fleas, not all veterinarians like them. “I recommend using natural flea products instead of chemicals due to the many detrimental side effects that can occur when using chemical products,” says Dr. Judy Morgan, a holistic veterinarian in New Jersey. She notes that some chemicals found in commercial options can potentially negatively affect not only the pet, but also the humans—including children—who administer them and come in close contact with the treated pets.
However, fleas can transmit a surprising number of diseases to animals and humans. Fleas can cause serious harm to you and your pet’s health through their bites and when they are ingested (such as when self-grooming) by the animals they target.
Loving pets can unknowingly bring fleas into your home.
Dog Fleas: Control, Prevention, and Treatments - Pets WebMD
Alternatively, if the spray bottle scares him, you can soak a washcloth with the mixture and rub it on. Many pets really like this! And the vinegar does make your pet more undesirable to the fleas.The flea eggs hatch within about two weeks into small worm-like creatures called larvae. Approximately 30% of the flea population consists of fleas in the larval stage. Unlike adult fleas which feed on your pet’s blood, flea larvae feed primarily on the feces of the adult fleas.Borax is not the same as boric acid! Boric acid is created by combining borax with an acid. It is harmful to pets and should not be used to battle fleas.Allergies to fleas are the leading cause of skin problems in cats and dogs. Most pets suffering from flea-related skin problems will not have large numbers of fleas on their bodies, because these animals groom themselves tirelessly to remove fleas.It might seem difficult but if you’re persistent, you can win the war on fleas if you address the entire flea problem, and not just the fleas you can see on your pet. It is always easier to prevent than to eradicate a flea infestation, so be sure to continue to treat your pets for fleas on a regular, monthly schedule and not just when you actually see fleas.Contrary to popular belief, flea infestation is not contagious. Rather, in endemic areas fleas are ubiquitous in the environment. Pets do not need to come into contact with an infested individual to develop a flea infestation.