"Dynastic, the wheels fell off at Matamata, but I think they were back on Te Rapa, and I reckon he'll like the mile at Riccarton," Walker said.
"Cognito has had a perfect prep and probably should have won last start, but just got too far back. Jason [Laking, jockey] would have learned from that and he's got a better draw [six] this time.
"Malborough Bay has had a lovely preparation but probably has to find a couple of lengths to be a top three chance."
Walker will have a three-pronged attack in the Pegasus Stakes (1000m) with Burgundy Rose, Challa and Aris Aris.
"Burgundy Rose is in career best form, but she's getting up in the weights now which her only problem," he said. "She's tiny and the old saying: weight can stop a train. But she's in fantastic form."
- NZ Racing Desk