“…Leukocyte counts are low in rabbits less than 12 weeks old and then gradually increase to maximum values by 3-6 months old (Jain, 1986;Melillo, 2007). Interestingly, the total white blood cell count in the 28-day rabbit fetus is also much lower than that of adult rabbits (Kriesten et al, 1987). A bimodal increase in leukocytes has been reported in rabbits, with the first peak at 3 months old, representing primarily lymphocytes, and the final peak at over 1 year old, due to an increase in neutrophils (Jain, 1986).…”