In the case of a minor infestation, you may be unable to see fleas on your dog's body. Check his armpits and his tail area where fleas normally gather. Run a flea comb through his fur to check for live fleas, and flea dirt, which is dried blood. read more
Flea dirt (flea feces) will fall off of the dog’s skin and land on the paper. One way to tell the difference between regular dirt and flea "dirt" is to wet any black specks that fall off the dog onto the white paper towel (using regular water sprinkled on the specks). read more
Check your dog’s fur to spot adult fleas. Use your fingers to part your dog's fur so that you can see its skin, looking for signs of adult fleas. Fleas tend to prefer the base of the tail, the abdomen, and behind the ears, but they can be found anywhere on the dog. Adult fleas are about the size of a pencil lead. read more