You can research many brands of premium dog foods and it's usually the owner's choice as to which one to go with. My dogs eat the Wellness Simple Food Solutions and have done very well on it. I would shop at only pet stores that carry premium foods and stay away from supermarkets as most foods sold there are loaded with grains and fillers. When changing any food it should be done in moderation and over the course of a week or two by slowing adding the new food to the old food until the changeover is complete. The amounts and times you are feeding Angus should be more than ample for a dog that size.
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Bob
If there are no dogs in Heaven, then when I die I want to go where they went.