There's been a lot of good hogs at the end of deer races. Don't beat him too bad for it.
T-bob is right I've seen my main dog take two does across a highline he was Nippin at their heels well bout 10 minutes later my Garmin showed him sitting down went to him a sure enough had a hog bayed
Leave on a deer, stop on a hog ! How long has it been since he's been hunting. If he's been on a chain for a while then he may have just been fresh and there was'nt any hog sign to run.