My husband and I have a cat that is 1 year old,we have been dealing with a large infestation for about 3 months. We have found out that the fleas are coming from our sand floor basement (unfinished). Our cat has been real good with the use of tea tree oil and lukewarm water sprayed on her. The tea tree oil is also known to be a antiseptic for sores caused by fleas and is less of an irrritant than some chemical based products. We tried fleas collars that did not much to remedy the problem as it only treats an area around the neck and not the whole body of the cat. We also tried brewers yeast sprinkled on our cat that did repel the fleas but nothing worked for us as well as the tea tree oil did. But using these remedies are recommended to do them outside as the fleas WILL jump from the animal, thus re-infesting your home and furnishing and being a nuisance. Well I hope this helps and Good luck. ... View related article.