The dosage systems allied with the academics, the doctors Varola and Roman, have been devised to test potential from speed through to stamina.

Kind Return, unbeaten in her middle distance career, oozes with class and stamina, is bred on a stallion cross involving Zabeel and Star Way and is from the same immediate family as the great Vice Regal. She represents the female line descending through Cinna and imported to New Zealand through Celebrity by JG Alexander.

There is an index available to calculate aptitude. A 2.40 ranking suggests 1600m potential. A smaller figure (say 1.00) suggests a staying aptitude and a 4.00 notation refers to a speedy typology.

Next to Kind Return the Oaks aspirants with a strong staying potential are the Jillings-\Yule contender Filante Etoile (Soviet Star-Georgina, by Nassipour) with her 1.22 index, the southerner Justine Coup (Entrepreneur-Royal Sirt, by Sir Tristram) on 1.30 and the Latta trained Wharite Princess (His Royal Highness-Regal Visit, by Vice Regal) on 1.34.

Despite its imperfections dosage can be a guideline to measure aptitude. However, it doesn’t measure a gifted trainer’s contribution to developing a sprinter-miler into a classic contender.

Listed below are the dosage rankings for leading contenders in this weekend’s New Zealand Oaks based on entries known earlier this week.

0.86 Kind Return (Zabeel-Kindness, by Star Way) Classy stayer.

1.22 Filante Etoile (Soviet Star—Georgiana, by Nassipour) Class and stamina

1.30 Justine Coup (Entrerpreneur—Royal Sirt, by Sir Tristram) Classy stayer.

1.34 Wharite Princess (His Royal Highjness-Regal Visit, by Vice Regal) Classy, ample speed.

1.37 French Lady (Entrepreneur—La Tebaldi, by Cure The Blues) Class and speed.

1.61 Madame Shinko (Shinko King-Madame Mac, by Lanfranco) Ample speed

1.63 Identity (Daggers Drawn-Hear’s Hoping, by Dahar) Quite speedy

1.78 Eftee One (Volksraad-Bashful Lady, by Imperial Guard) Ample speed. Miler in aptitude.

2.32 Penny Hill (Pentire-Lady Trimar, by Sir Tristram) Classy, speedy

2.44 Grand Time (Grand Lodge—Santa Rita, by Pompeii Court) Speedy miler

2.52 Eternal Melody (Shinko King-Billie Holiday, by Defensive Play) Miler in type

2.56 Midnight Kiss (Groom Dancer-Midnight Assembly, by Night Shift) Miler with brilliance

2.83 Buckle My Shoe (Rory’s Jester-Rose of Marizza, By Nassipour) Speedy miler; stamina in behind

3.53 Calveen (Canny Lad-Calvinia, by Varick) Speedy miler.