If you were not instructed by your dog's vet to use Teramyacin to clear up the tear staining, please read on. Tear staining is caused by excessive tearing. What cases the excessive tearing is what needs to be found out or the problem may always persist.
The definition of attest is to affirm something to be true or to authenticate. An example of attest is to prove to a college what an excellent candidate a student is for the school. to declare to be true or genuine.
assay-a quantitative or qualitative test of a substance (especially an ore or a drug) to determine its components; frequently used to test for the presence or concentration of infectious agents or antibodies etc.. the means by which the presence, quality, or genuineness of anything is determined: a test of a new product. 2. the trial of the quality of something: to put to the test. 3. a particular process or method for trying or assessing. 4. a set of problems, questions, etc., for evaluating abilities or performance.