Finishing entire males allows for better feed conversion, greater lean yield, and higher animal welfare. Historically, the problem with raising entire males was the possibility of developing boar taint when boars reach sexual maturity. However, immunocastration is a viable option for raising boars and preventing boar taint. Entire males will likely have higher amino acid requirements due to the increase in protein deposition,  but feed efficiency is increased which will likely result in lower feed costs overall. Some progress has been made in genetically or nutritionally reducing boar taint, but the most effective method is immunizing against gonadotropin releasing hormone (GnRH). Immunocastrated males have a lower feed efficiency than entire males after the second dose is given (4-6 weeks prior to slaughter), but it is still above that of barrows. Restricting feed intake or dietary energy may be able to reduce fat deposition after the second dose. Immunized males may be practical option to utilize feed efficiency and protein deposition close to entire males while avoiding boar taint, resulting in increased financial returns.