The vaccine Improvac® is an effective means of controlling boar taint without affecting performance attributes up to the second vaccination. While the second vaccination has been shown to increase feed intake and weight gain compared to entire males, it also causes an increase in the depth of P2 backfat which may result in penalties for the producer at processing. Reducing the timing between the second Improvac® vaccination and slaughter to two weeks instead of four weeks allows for the control of boar taint levels without increasing the depth of P2 backfat. This keeps the pigs lean at slaughter. Not only will this reduce the penalties at processing for pigs with high P2, but it will also ensure boar taint does not have a negative impact on consumer experiences with pork.