166 DISEASES/DISORDERS
Fig. 9.3.Perianal fistulae in a 7-year-old female-spayed pit bull terrier. Punctate lesions are present most
notably in the upper right quadrant of the perianal tissues. The major differential diagnosis for this case is anal
sac impaction.
Fig. 9.4.Multiple draining tracts in a 9-year-old male-castrate pit bull mix.