Having come through their fitness test and a robust training after the Christmas break, Greatholder said despite the balmy weather they wanted to see how the troops fared for 90 minutes with minimum substitutions.
With 28-year-old Smith's hat-trick, the pressure will be on the incumbent strikers of golden boot contender Sean Lovemore, English import Stephen Hoyle and homeboy who just made his Bay debut Dakota Lucas.
"He [Smith] was brilliant ... It's a good headache.
"I haven't had one this season, Greatholder said, adding someone would be unfortunate not to make the cut on Sunday.
While the senior men could have scored a few more goals, he felt the youth team had kept his troops honest.
"They [Bay United Youth] were good. They hustled, harried and played some decent football."