A PETsMART Staff Report Fleas are one of your pet's greatest enemies. These tiny, wingless insects jump onto cats, dogs, and people and ingest their blood. Their complex life cycle includes several microscopic stages including egg, larvae, and pupae.
Fleas can live for several months.
Signs of fleas Finding out if your pet has fleas. It's the time of year for fleas. Steps for stopping a flea infestation. These long, flat parasites can cause weight loss and diarrhea, and can be contagious to you and your family. These are tapeworm segments, and they also can be found on your pet's bedding.