I'm using Ziegler gold now which is what the tiger trout were fed at the 2 different places that raise them up here, and appears to be a first rate product, plus my trout seem to get the majority of their nutrition from natural forage.

The local Agway here carries it and I don't have to drive 45 miles to the closest Purina dealer.
http://www.zeiglerfeed.com/product_literature/aquaculture%20literature_finfish/Finfish%20G.pdf