We normally send ours for pork at about 22-26 weeks, and for bacon at 9 months-1 year. We don't normally keep uncastrated boars much past 7 months, but had 2 that went at nearly 10 months the winter before last (because we couldn't get them out of their field past the 4 foot snowdrifts etc. before then) and they made beautiful bacon, with no hint of taint.