I switched from Dumors to Purina Layer feed with Omega including the Scratch. They absolutely LOVE it. Knock on wood (my head) I haven't had any problems. In fact, their plumage is vibrant in color, soft and fluffy!Interesting as I've been feeding Purina Flock Raiser for a while now. Fingers crossed! As for seeds/nuts going rancid storing in the freezer or refrigerator keeps them fresher. I live in the South & store all nuts & seeds that way.
I bought Dumor scratch again just to try one more time and I returned it. They would not even touch it! Spoiled Brats. I even read on here somewhere that Purina makes it for TS.