Must Be Sain is a thoroughbred horse born in Australia in 2022. Race horse Must Be Sain is by Zousain (AUS) out of Must Be Mink (AUS) , trained by Shane Nichols & Hayden Black. Must Be Sain form is available here. Owned by S P Nichols, Four Old Mates Racing (Mgr: A K Douglas), R J Atchison, A J F Buhagiar, R D McIver, Newys Inn (Mgr: S M Daniel), M Paganoni, A J Fly & Mrs M Byrns.