http://www.dogfoodadvisor.com/red-flag-ingredients/bha-in-dog-food/
If you want to help your dog live a long healthy life - do your best to avoid products like this which contain known carcinogens (such as cancer causing preservatives like BHA)
I don't know why Purina insists on putting that in their products - they really do know better!
Help the health of pets world-wide and boycot everything that includes this poisonous preservative.
Concerned Veterinarian in Colorado