I Feed Her Purina Puppy Chow About 2 Cups A Day. And As Far As Being Bulky She Is Only 9 Weeks Old So She Hasnt Had Time To Get Bulky Yet I Think Its Just Cause She Plays And Runs So Much. Last Week The Vet Said She Was Perfecly Proportioned And I Have To Take Her Back Next Week So Ill Let U All Know What She Says Then But I Still Would Like Everyones Opinion.