There was no movement of the coffin bone, within the hoof wall.
This is the second time a quarter crack, or split in the hoof wall, has interrupted Quality Road's training.
By Saturday, the spot had turned into a slight quarter crack, or a stress fracture of the hoof wall, about five-eighths of an inch long.
On Friday, McKinlay removed the steel sutures holding the crack together, cleaned Big Brown's hoof and laced the hoof wall together with new sutures.
Perhaps as early as Monday, McKinlay expects to close the crack in the hoof wall, which is about five-eighths of an inch, with wire stitches.
"He'll be fine in five or six days, but if we trained him for the Belmont, it could lead to a larger crack in his hoof wall.
The Derby winner jumped forward, lost his footing, slid into the door and sustained a cut about the size of a dime in his right front hoof wall.
When he is certain that the crack is clean and that any chance of infection has passed, he will close the crack in the hoof wall with wire stitches perhaps as early as Monday.
Two weeks ago, he developed a slight quarter crack — a vertical crack in the hoof wall between the toe and the heel — that kept him away from the track for three days of training.
Quality Road, a son of Elusive Quality, sustained a slight quarter crack, or a split in the hoof wall, in his right hind foot after looking superb March 28 in winning the Florida Derby.
