Common causes:

Fleas are attracted ( as parasites) to animals that are compromised in their health, especially young animals or old geriatric animals.

Flea larvae are often present in dust or on a place where other cats (or dogs) have rested and shed larval forms and flea eggs. In  summer the larval fleas can climb up a grass stem and jump onto the animal as it passes. Regular flea treatment with a spot on (chemical flea killer) is advised especially in the summer, but you must eliminate fleas from the environment to be successful. Use of poor or inappropriate diet can contribute to the frequency or reoccurrence of infestations.


 Continuous scratching or biting at the animals own body. Usually in dogs the presence will be associated with a rough or bare spot on the back above the tail. Commonly known as "flea allergy" it is also associated with food allergy which attracts the parasite because the individual is compromised in its health and if not treated would in the wild situation eaten by a predator since it is not able to compete for food and other necessities. 

Skin disease may underlie the presence of fleas;especially food allergies so correction of diet is essential even although the flea preparations available are very effective and broad spectrum treating ticks and mites in certain circumstances ,as wel, depending on the formulation and frequency of application 

Consider This:

Buy a “ spot on” treatment from your vet and treat regularly especially if in an area where ticks are a problem (East Coast of Australia) amongst other places.).  A  visit to  the subscription pages of this website is suggested to get further advice on natural methods and diets . You should treat the underlying causes as well as the parasite