Hafrashat challa dinner rolls

Hello rabbi and thank you!
Can I buy 2 or 3 packs of this an do hafrashat challa with a bracha? Or need to make the Dow from scratch?
Thanks

No hafrashas challah on dough bought from a non-jew.

What about the Challah rolls I buy at Whole Food bakery?

Why should WholeFoods be different?