Most pets with fleas show few symptoms, until the infestation is severe. The major red flags are excessive itching and possibly a rash. You could also see the fleas crawling through the haircoat - much like head lice except they are brown/black color and they leave behind "flea dirt" on your pets coat. And for you, the owner, small red flea bites on your own feet and legs!
How can I prevent my pet(s) from getting fleas?
There are several safe products that are available for the prevention of fleas. These products can be used alone, or can be combined with heartworm preventative products. They are safe, effective, and relatively inexpensive.
But my cats never goes outside, should I worry?
Well even you can carry a hitchhiking flea into your home so that it could find its way to your pet. And what if you have a dog? Well they most certainly could mobilize the "flea army" to invade your home and once inside a feline blood meal is just a tasty as the canine version.
How long can fleas stay in an enviroment ie. your home?