The majority of the flea life cycle occurs off the animal. Eggs are laid on the animal but fall into the home environment. It is estimated that only a very small proportion of the flea population is on the animal, with the majority in the home environment, such as the carpet. Adult fleas that are on the animal feed on blood and can be very irritating. Fleas can pass from one infected animal to another.
With a heavy flea burden, the environment must also be treated, otherwise fleas will continue to emerge from the environment and land on pets. The can continue for several months until the flea lifecycle is broken. It is important to treat all of the areas that your pet goes in the house.
Fleas will bite cats, dogs, rabbits and even humans. The flea saliva can irritate the skin, causing an allergy known as Flea Allergy Dermatitis (FAD). Fleas can also transmit viral and bacterial diseases. In small puppies and kittens, fleas can also cause anaemia.