Don't put nothing on his nose, your currently trying to test his nose right? So pretty obviously don't be screwing with his sence of smell. Also yeah, if you have no other option, get one of them dog diapers from petsmart and leave her in the truck.
He still may not perform well BECUASE he'll be worried over her.
My bad I read the post wrong I thought he was wanting to try a male catch dog with her not a strike dog ya don't put nothing on his nose