Ever wonder what those pesky little fleas look like up close? Check out this live view of a flea under a microscope. Fleas can be way more than an irritation to your pet, a long with their bites causing itching, some animals experience allergic reactions causing hair loss and skin irritation. Left untreated a bad enough flea infestation can also lead the animal to become anemic! Did you know your cat doesn't have to go outside to end up with fleas? It's as simple as you walking through your yard