A vacant box is a starting box with no greyhound in it for a race: fewer than eight dogs were drawn, or a dog was scratched too late for a reserve to take its place. The box stays empty, and the other dogs keep the boxes they drew.
Under the Greyhounds Australasia Rules (GAR), effective 1 January 2026, a race is for up to eight greyhounds, so an empty box changes the start for the dogs either side of it. Greyhound racing betting covers the race around it.
How a box ends up vacant
- A short field at the box draw. With fewer than eight eligible dogs, rule 85(3) fixes which boxes stay empty, though Greyhound Racing Victoria may set them itself (local rule 41, local rules effective 1 November 2025). The greyhound box draw lists the rule's table.
- A late scratching. Reserves come in only at the appointed scratching time, the deadline each controlling body sets. A dog withdrawn after it is not replaced: its box stays empty and nobody moves (rule 85(6)), unless the controlling body orders a redraw (rule 85(7)); greyhound betting rules covers what a late scratching does to bets.
- No reserve to call on. Greyhound Racing Victoria's Bottom-Up meetings draw no reserves (grading guidelines effective 5 August 2026), nor do Racing Queensland's preferential box draw races (grading procedures, April 2025), and two scratchings with one reserve leave a gap too.
How reserves fill boxes before the deadline is covered under greyhound reserve.
Why a vacant box beside a dog can help it
An empty box is room: the dog beside it can begin with no dog against it on that side and move towards the gap without crossing anyone. In a short field, the rule's pattern decides who gets that room:
| Dogs at the box draw | Boxes in use | Dogs with an empty box beside them |
|---|---|---|
| 7 | 1, 2, 3, 4, 6, 7, 8 | 4 and 6 |
| 6 | 1, 2, 4, 5, 7, 8 | 2, 4, 5 and 7 |
| 5 | 1, 2, 4, 6, 8 | 2, 4, 6 and 8 |
| 4 | 1, 3, 5, 7 | All four |
Rule 85(3) never empties box 1; where it applies, only a scratching can. A wide runner with space outside it, or a railer with space inside it, stands to gain most. Room is not speed, though: a quicker dog from further out can still cross in front.
How vacant boxes show on race day
- Form guides print the slot as Vacant Box, as Greyhound Racing NSW's expert form on thedogs.com.au does (checked 8 October 2026).
- A late scratching shows SCR against the dog, and its box stays empty.
- Drawn dogs wear their box's rug (rule 85(4)), so the dog in box 6 wears green whoever runs beside it; a reserve wears rug 9 or 10 (rule 85(5)).
- Prices are framed again for the smaller field, and a fixed-odds bet struck before a late scratching can be paid less a deduction, as scratchings and deductions explains.
- A smaller field can cut the places paid, as greyhound place betting works through case by case.
Checking whether the gap helps a dog
Test the dog, not the theory. An illustrative record for a wide runner drawn in box 4 at one track and distance:
| Box 5 | Starts | Wins | Strike rate | Fair share |
|---|---|---|---|---|
| Empty | 3 | 1 | 1 / 3 = 33.3% | 1 / 7 = 14.3% |
| Filled | 14 | 2 | 2 / 14 = 14.3% | 1 / 8 = 12.5% |
Beside the gap it won 33.3 / 14.3 = 2.3 times its fair share. But a dog with exactly a 1 in 7 chance each time wins at least once in 3 starts 1 - (6/7 x 6/7 x 6/7) = 0.370 of the time, about 37%. Three runs cannot separate the gap from luck.
Where B337 fits
Whether a gap helps a particular dog is your judgement: B337 compares prices and does not rate dogs. When a late scratching leaves a box empty, the Terminal's price history (flucs) shows each remaining dog firming or drifting, with each bookmaker that prices the race in its own column and exchange back and lay alongside. Prices come from 40+ bookmakers across racing and sports, read on a repeating cycle, so a price on screen can trail the bookmaker's own: confirm it in your account before you bet. A free account opens a limited view of the Terminal with live odds.
Risk: Betting involves risk. An empty box gives a dog room, not speed, and the dog beside it can still lose. See responsible gambling for limits and support.