"There's a bit of bruising there, but he's nearly back to 100 per cent," he said. "We'll put him on the treadmill to keep him going. He's not going to miss any work.
"We're lucky the nail didn't go into the frog of the foot and cause real damage. But it was still a scare and not something you want to happen an hour and a half before he races."
Marsh was thrilled with Vernanme's performance and so was rider Jason Waddell, who is booked to ride him again in the New Zealand Derby.
"It was a perfect trial for the Derby and Jason was very happy with how he went," Marsh said. "The 2400m is going to suit him even better. He should love it."
Stablemate Crown Prosecutor is still on track for the New Zealand Derby despite the group three Wellington Stakes (1600m) winner finishing ninth to Sponge Bob in the group two Waikato Guineas (2000m).
"Craig Grylls is confirmed to ride him and he'll be going forward on him in the Derby," Marsh said. "He got back in the Waikato Guineas and it was too hard making ground from the back that day. Besides, he's better ridden forward."
Marsh also has a black-type mission in store for Rocanto, who fought well for third behind Ever Loyal after leading in the open sprint at Ellerslie last Saturday.
"He just had to work a bit, but he went well," Marsh said. "He'll go to the Waikato Stud Plate [group three, 1200m] on Derby day at Ellerslie."
Marsh also reports last-start group one BCD Group Sprint (1400m) placegetter Ardrossan continues to thrive as he gears up for the group one Canterbury Stakes (1300m) at Randwick next month.
"We're just working through to finalise a rider for him over there."
Meantime, Marsh is hoping to land his first Matamata Breeders' Stakes to avenge the unlucky run of Nahema when beaten a mere nose by Serena Miss in the feature four years ago after being tightened near the finish.
"Appellant should be a top chance on her Karaka Million run and even though Glinda Goodwitch is a maiden I really like her. She's a very promising filly," Marsh said.
Appellant, to be ridden by Jason Waddell, has been a model of consistency. She went into the Karaka Million 2YO with a last-start win at Ellerslie after two thirds, the second one behind stablemate Exuberant in the Listed Wellesley Stakes (1000m) at Trentham.
Glinda Goodwitch, a daughter of Per Incanto, was a trials winner before fighting hard for second behind Equinox on debut at Trentham last month, with Craig Grylls to ride her on Saturday.
Stablemate Scotch, a debut winner at New Plymouth, will be attempting to bounce back in the group three Waikato Stud Slipper after disappointing when second-last in the group three Woburn Farm 2YO Classic (1200m) at New Plymouth.
"It's a bit of a head-scratcher why he went that bad at New Plymouth, but I'm happy with him going into Saturday," Marsh said. "Jason Waddell will ride him again." NZ Racing Desk