With his top-class son Bustling an odds-on favourite in the WA Sires’ Produce Stakes, former Darley shuttler Frosted (USA) was off the mark early with the honest 2-year-old colt Snack Bar making all the running in the Sportsbet Photo Finish Refund Hcp (1400m) at Caulfield.

Zousain has posted his second new winner this week at Cranbourne on Friday evening when the Phillip Stokes trained filly The Dabble Effect scored on debut.