While the ground will suit Manhattan Street, it is a cause for concern for stablemate Authentic Paddy who runs in the Thompson Hcp.
"It's a bit of a worry, now he's older he doesn't like it too wet but he needs a run before the weight-for-age race at Ellerslie on Melbourne Cup Day," Latta said.
The stable's other runners at Trentham include Dreams Of Platinum, who ran third on debut, in the Wellesley Stakes and Bannockburn in the Hanley Formula Premier.
"Dreams Of Platinum surprised us at Tauherenikau where she jumped and led as she'd been slowly away at the trials," Latta said.
"She's done very well since and Bannockburn is a very honest horse and he should run well again."
Matamata jockey Matthew Cameron is facing a tricky decision ahead of the season's first group one challenge for 3-year-olds.
The contracted rider for Te Akau Stables will have to choose between the Stephen Autridge and Jamie Richards-trained pair of Heroic Valour and Hall Of Fame for next month's 2000 Guineas.
Cameron has been aboard Heroic Valour in five of his six starts and three of his four wins.
He also guided him to second in Saturday's Barneswood Farm Stakes at Ashburton behind La Diosa.
"Heroic Valour got to the front a bit too soon so he'll be ridden off the pace next time in the Guineas, he's on target," Autridge said.
"Hall Of Fame does the job right and Daniel Miller galloped him on Tuesday morning and he said don't worry, he's up there with the good ones. Matt will go down and ride Hall Of Fame on Saturday and then it's his call as to which one he wants to ride."
Cameron will partner Hall Of Fame in the Zacinto Stakes at Riccarton today in his Guineas dress rehearsal.
- NZ Racing Desk