Walmart: Premium Wild Bird Mix

Have been buying Armstrong Premium Year Round Bird Food paying 21.99 (9.97 lb) for a bag containing 4 kg (8.8 lbs) at Pet Valu. Then went to Bulk Barn. I went with the high-end Bulk Barn "Premium Wild Bird Mix." I purchased 4.185 kg @ 4.95 kg. Contents: "A rich blend containing soft wheat, white millet, black oil sunflower seeds, red milo, striped sunflower seeds, peanuts, red millet, and safflower." Today I notice Walmart selling, Wild Bird Food Premium Year-Round 9KG for 8.46 on sale from 16.96. Contents: "wheat-free blend of cut (cracked) corn, red milo, white millet, and black oil sunflower." I'm a first timer so go easy on me.