At the end of the treatment period, all surviving doves were anesthetized with an intramuscular injection of ketamine/xylazine and euthanatized by exsanguination by cardiocentesis. Postmortem examination was done within 4 hours of euthanasia.
The single-dose study reported a macroscopic observation of the thymus of one male rat in the control dose group presenting as "discolored red." Microscopically, this presented with hemorrhage and was considered an incidental finding, possibly related to terminal cardiocentesis. No other microscopic changes were observed.