Table 2.

The characteristic mean level of the body weight gain percentage (BWG %) of experimental animals (Wistar albino rats) through different weeks of the experimental period.

Feed	Body weight gain % of rat in the first one week	Body weight gain % of rat in the 2nd two weeks	Body weight gain % of rat in the 3rd two weeks	Body weight gain % of rat in the 4th two weeks	Body weight gain % of rat in the final 8th weeks
Control (feed with normal pellet)	53.96 ± 0.94a	93.45 ± 0.96a	98.74 ± 0.42a	99.83 ± 0.43a	101.34 ± 0.87a
Feed with 15% niger seed oil	37.15 ± 0.97b	190.13 ± 0.70b	220.93 ± 0.65b	221.77 ± 0.67b	217.65 ± 0.51b
Feed with 15% sunflower oil	33.62 ± 1.4c	48.68 ± 1.15c	65.04 ± 0.87c	65.11 ± 0.90c	71.23 ± 0.96c
Feed with 15% palm oil	209.57 ± 0.51d	248.20 ± 1.0d	273.73 ± 0.38d	271.97 ± 0.23d	265.47 ± 0.47d

Data were expressed as means ± SD (p < 0.05). Values with different letters within the same column are statistically significant.