The issue with Fleas:
Fleas are irritating pests causing pets to itch and scratch, damaging the skin. Some pets are allergic to the flea’s saliva making them intensely itchy with a single bite. It is estimated that flea-related diseases account for almost 50% of skin problems reported to veterinarians.
The adult fleas that you see are only the tip of the iceberg – estimated to be 5%. The other 95% are in the form of invisible