Thirty-six weanling and 28 adult female New Zealand White (NZW) rabbits were utilized in two consecutive experiments under North Sinai conditions.  In Experiment 1, weanling rabbits (5 wk old, 644±14 g BW) were randomly assigned to four treatment groups, each included three cages with three rabbits/cage.  Rabbits of all groups were fed the concentrate diet ad libitum and were offered drinking natural-underground water. The treatment groups were designated as follows: 1) a control group (Ctrl) receiving the concentrate diet  (104 mg Zn, by analysis)  with no additional supplements, 2) a Zn-supplemented group (Zn) receiving 30 ppm supplemental zinc as ZnSO­₄.5H₂O in the drinking water, 3) a corn oil-supplemented group (Oil) receiving 5 g.head^-1.d^-1 of corn oil added to the diet and 4) a Zn+corn oil-supplemented group (ZnOil) receiving 5 g.head^-1.d^-1 of corn oil added to the diet plus 30 ppm supplemental zinc as ZnSO­₄.5H­₂O in the drinking water. At the end of the 56-day growing period, 24 rabbits were chosen at random and slaughtered; serum samples were analyzed for selected constituents and carcass traits were evaluated.  The ZnOil group had the highest average daily gain (25 g/d) followed by the Oil group (23.5 g/d), whereas the Zn and the Ctrl groups were almost similar. Daily feed intake did not differ (P>.10) due to treatment. Feed efficiency was improved by 32% in the ZnOil and Oil groups compared with the Ctrl (P<.05). Changes in serum metabolites are tabulated and discussed. Dressing percentages were increased (P<.05) with addition of corn oil or Zn plus corn oil. In Experiment 2,  the doe rabbits were individually housed in galvanized wire hutches and had free access to natural-underground water. The doe rabbits were divided into 1) a control group (DOE1) receiving ad libitum the concentrate diet (104 ppm Zn) with no additional supplements, and 2) a treated group (DOE2) receiving the control diet ad libitum plus 10 g.head^-1.d^-1 of corn oil added to the diet and 40 ppm supplemental Zn as ZnSO­₄.5H­₂O in the drinking water.  Supplementation began 1 month  before breeding and continued during pregnancy through lactation until weaning of the offspring  at 25 d of age.  Percentage of the does kindled/does bred did not differ (P>.10) between treatments.  Compared to the control group, DOE2 had significantly higher litter size alive at birth. Pre-weaning mortality was lower (P<.05) in the DOE2 group than the DOE1 (35.2 vs 42.4 %).  Litter size at weaning was higher (P<.05) in the DOE2 group than the DOE1 (4.18 vs 3.17 ± .5).  Litter weaning weight was higher (+ 52 %, P<.05) and bunny weaning weight tended to be higher (+ 7 %, P>.10) in the DOE2 group than the DOE1.