Brutus is coming on 4 months now and I know exactly how you guys feel. When we got him we were feeding Iams(I know). Well now he's on Nutro Ultra Adult which isn't the best food around but is pretty good. Since we have noticed a steady growing rate, high energy levels, and a soft shiny coat. You're doing the right thing by finding a good premium food for your furbaby.
I measure Brutus's growth by how often I have to adjust his collar so it will fit. It's fun to see how much he has grown time to time.
Brutus-11/24/05 White w/Brindle, Floppy, Docked, and Loving
Karma-Bull Terrier 2/17/06 Tri-color Little Ball of Energy