CAB Abstracts has an extensive and detailed controlled vocabulary system. Veterinary terminology is well accounted for, more so than PubMed. Use the CAB Thesaurus to find descriptors to use in your search strategy.
Each citation is assigned at least one CABICODE, which describes the specific subject area the citation is related to. CABICODES can be useful in advanced searching, as they typically code subjects that are difficult to describe with keywords.
CAB Abstracts uses a controlled vocabulary system where terms are called "descriptors." Search the CAB Thesaurus from within CAB Abstracts, or by going directly to the website.