Dunn is in with more than a chance in the US$500,000 Hambletonian Oaks as he drives unbeaten favourite Millies Possession.
"She is a really strong filly so she has to be a great chance," he offers.
He will also partner exceptional trotting mare Machego in the main free-for-all trot and former Hambletonian winner Pinkman as he takes on former Kiwi hero Speeding Spur in a US$70,000 trot.
"It has been a great season so far, a lot of work, but it has gone far better than I could have expected," said Dunn.
"But Hambo Day is a really big deal over here so to have some winning hopes is really cool."
Still overseas but closer to home, New Zealand-trained trotters have serious winning chances in the two features at Maryborough in Victoria tomorrow.
Two-year-old Ultimate Stride is a dominant favourite in the Redwood for trainer Phil Williamson, who also prepares surprise package filly Liberty Stride as the favourite for the A$75,000 Victoria Trotting Derby in which Kratos for South Auckland trainers John and Josh Dickie is also among the favourites.