These are carried by the fleas. Ear mites can cause severe ear infections and as a result tear staining. Fleas require a pro-active approach to keep under control. Before attempting to remove the tear staining from a dog's face, it is most important to have eliminated the source of the staining. Otherwise it will just come back and many times it will be worse than before.
The definition of an artifact is something made by humans and often is a primitive tool, structure, or part of a functional item. An example of an artifact would be a cooking pot found by archaeologists that Ancient Romans might have used. any object made by human work; esp., a simple or primitive tool, weapon, vessel, etc.
1 â (linguistics) The text in which a word or passage appears and which helps ascertain its meaning. ( 2 archaeology) The surroundings and environment in which an artifact is found and which may provide important clues about the artifact's function and/or cultural meaning.