Pest profile

Dog Flea

Ctenocephalides canis · Siphonaptera: Pulicidae[2]

The dog flea looks very similar to the cat flea but is found less often, especially on dogs kept outdoors or in rural areas.[1]

Dog flea adult, a cleared brown flea specimen seen from the side under a microscope
Dog flea adult, a cleared brown flea specimen seen from the side under a microscope. Ctenocephalides canis by Hallvard Elven, Naturhistorisk museum, Universitetet i Oslo — via Wikimedia Commons, CC BY 3.0

How to identify it

  • It has combs of bristles below the eyes and behind the head, like the cat flea.[1]
  • In the dog flea, the first spine of the comb below the eye is much shorter than the second.[1]

Look-alikes

Look-alikeHow to tell them apart
Cat fleaNearly identical; the length of the first two spines in the lower head comb separates them.[1]

Where it lives

It occurs worldwide and has been reported from 31 U.S. states and the District of Columbia.[1]

US map: public records from 8 states since 1990 (GBIF).

Biology and life cycle

The life cycle takes two to four weeks, so there can be many generations a year; numbers peak in late summer or early autumn.[1]

Adults usually stay on one host for life, and hosts include dogs, cats, rabbits, rats, foxes and people.[1]

Health risk

It can carry the dog tapeworm, which people, especially children playing with pets, can get by swallowing an infected flea.[1]

Control

Prevention

Confirm fleas first: look for fleas on pets, bites around your ankles, black flea dirt, or comb your pet or walk in white socks.[1]

Sanitation

Vacuum carpets and wash pet bedding; outdoors, wash dog house bedding and set it in the sun.[1]

Traps and physical control

Bathe pets and comb them repeatedly with a metal flea comb to remove adults.[1]

Pesticides

Use an EPA-approved topical flea treatment, after checking with your veterinarian about your dog's health and breed sensitivities.[1]

Common questions

Is my dog's flea a dog flea or a cat flea?
Usually it takes a close look at the head combs; the cat flea is found more often.[1]
Can dog fleas give people tapeworms?
Yes, if an infected flea is swallowed, which most often happens to children playing with pets.[1]

Sources

  1. University of Florida IFAS Extension (Featured Creatures), “Dog Flea, Ctenocephalides canis (EENY-589).” edis.ifas.ufl.edu/publication/IN1033 (accessed 2026-10-06)
  2. iNaturalist, “Ctenocephalides canis taxon page (order and family).” www.inaturalist.org/taxa/307364 (accessed 2026-10-06)

Updated 2026-10-14. Built from sourced records. Spot an error? Tell us.