Fleas are small external parasites that feed on blood. Adult fleas jump onto dogs to feed, but most of the flea lifecycle occurs in the environment, including in bedding, carpets and outdoor areas. Flea infestations can cause itching, allergic skin disease, hair loss and secondary skin infections. In severe infestations, particularly in puppies, fleas may contribute to anaemia. Fleas can also transmit the flea tapeworm (Dipylidium caninum) if infected fleas are ingested during grooming.
Signs of flea infestation in dogs may include scratching, chewing or biting at the skin, hair loss, red or inflamed skin, and the presence of flea dirt (small black specks) within the coat. Some dogs, particularly those with flea allergy dermatitis, may develop severe skin irritation, while others may show minimal signs despite significant flea burden.
Effective flea control involves treating all pets in the household and reducing environmental contamination to break the flea lifecycle.
Veterinary flea prevention products may include oral medications, spot-on treatments, collars and long-acting injectable products. Long-acting injectable flea prevention may be particularly useful for owners who find regular monthly dosing difficult.
Because much of the flea lifecycle occurs in the environment, regular vacuuming and washing bedding are important components of flea control, particularly during established infestations.
Most of the flea lifecycle occurs in the environment rather than on your dog. Fleas develop through egg, larval, pupal and adult stages, with eggs and immature stages commonly found in bedding, carpets and outdoor areas. The pupal stage is particularly resistant and can persist in the environment for extended periods before adult fleas emerge. Modern flea prevention products rapidly kill newly emerged fleas after they jump onto your dog, helping reduce environmental flea contamination over time. During established infestations, regular vacuuming and washing bedding may help reduce the environmental flea burden more quickly.
The cost of flea prevention varies depending on your dog’s size, lifestyle and the type of product used. Some products also provide protection against additional parasites such as ticks or intestinal worms. Your veterinarian can help recommend a prevention plan that is appropriate for your dog and household.
Our veterinarians provide personalised advice on flea prevention and parasite control based on your dog’s lifestyle, environment and health needs. Our University Veterinary Teaching Hospitals are committed to evidence-based preventive care to support your pet’s ongoing health and wellbeing.
Yes. Fleas can be difficult to see, and some dogs are highly sensitive to flea bites. Even small numbers of fleas may cause significant itching and skin irritation.
Often yes. Most of the flea lifecycle occurs in the environment rather than on your dog. Washing bedding and regular vacuuming can help reduce environmental flea burden, particularly during established infestations.
Newly emerged fleas may continue to jump onto your dog for some time after treatment begins. Modern flea prevention products rapidly kill these fleas before they can reproduce, helping reduce environmental flea contamination over time.
Yes. Year-round flea prevention is recommended in Australia, as fleas can survive throughout the year in many environments.
