Information and advice for the war-weary. Nothing, if you read the information below. And they have to be dealt with in a ruthless manner.
Fleas are hardy and determined.
Additionally, the fact that fleas don't spend most of their time on the pet makes the problem of locating them and wiping them out harder still. Their most resilient stage, the tiny hibernating cocoon, can live in your environment over a year without feeding and is protected by an impenetrable shell. It is this stage that survives most treatments and returns to breed and re-populate year after year like a cruel sequel to a horror movie. It's something no one wants to know. Pets act like small mine- sweepers, collecting hatched and hungry fleas from everywhere.