"He trialled up at Te Teko [right-handed] and railed like a greyhound," she said. "It is just a mental thing. He is not the easiest horse and he hasn't really put it all together yet.
"I think when the penny drops, he has got Group horse potential. He is a very good horse but he is still a bit dumb and doing a lot of things wrong.
"I think we can probably cross the right-handed barrier at some stage in the future, but at this stage we will keep him to left-handed racing this preparation until we can get his racing manners a bit better.
"He's not an overly robust animal but he's very athletic and he doesn't drop away, he keeps his condition. I do space his races and he doesn't require much galloping between races."
Raced by the St Germaine Syndicate, Germanicus is out of the former John Sargent-trained mare St Germaine, a Group 3 winner and Group 1 placed.
Although holding a nomination for the Group 1 Harcourts Thorndon Mile (1600m), Guy said things would have to go the right way to be considering a tilt at the elite level just yet.
"He is probably 12 months away from a race like that. He is definitely up to that class and ability, but he is probably not ready mentally yet.
"But if he came out and ran a blinder [today] and then won again, maybe he would get there, but it is pretty much pie in the sky at this stage."
Guy will also saddle 5-year-old mare Sunburst in the same race and she returns to a mile after failing over 2040m last start.
"I don't think she can beat him but she will run well."
- NZ Racing Desk