Endo- and ecto-

Most living creatures, including both cats and humans, are subject to invasion by other living creatures. Endoparasites live on the inside of us, and ectoparasites live on the outside. Some of these creatures are harmless; some are extremely harmful. And some are just irritating.

One thing is certain for the cat owner: no matter how healthy your cat may be, and no matter how much tender loving care you supply, you will at some point have to give some attention to the various tiny critters that live on or in your cat.