GPT and cholestasis: On the one hand, all of the parameters indicative of adequate liver function in healthy dogs are closely associated, and within them, three well-defined subclusters were identified: ALP and ALT (indicative of liver damage and cholestasis; in this case the absence of these), ALB and GLU (indicative of adequate metabolism when above the lower range) and BUN and GLOB (within the normal values indicative of the absence of disease).