You may see live fleas or perhaps just the excrement left behind where it took its meal. Flea excrement looks much like finely ground pepper. As it is a digested blood meal, if you put some on a damp white tissue you can see that as it dissolves it leaves a rust coloured stain on the tissue. In some cases the flea infestation will be great enough that you can see the little devils scurrying about on your pet. They are usually most visible in the groin area.
Fleas are blood sucking wingless insects.
They are somewhat smaller than a sesame seed and are flattened side to side. They have powerful hind legs enabling them to jump long distances. They can jump onto their host from infested indoor and outdoor areas and from other animals, both domestic and wild. Effective Flea Control is based on the life cycle of the flea. 50 Eggs are what make up the largest portion of the population.