The phrase "pig model" refers to using pigs as a way to understand or study something. It's like using pigs as examples or representatives to learn more about a specific topic or situation. Full definition
The technology also has the potential to knock out specific genes to create pig models of human diseases. (sciencemediacentre.org)
Model C: Guinea pig model for protective efficacy. (tbvi.eu)
Her research involves preclinical immunology and efficacy of vaccines against H5N1 pandemic influenza, malaria, and Mycobacterium tuberculosis using mouse, ferret and guinea pig models. (idri.org)