Dog Food Premix

What are the pros and cons of including raw in my dogs diet?
I already feed a high quality kibble (Timberwolf). I am considering incorporating The Honest Kitchen to her daily food routine (I haven’t found any other premixes available around here). I’m thinking raw in the morning and kibble in the evening.
However, before I make this decision, I want to make sure that the benefits outway cons (right now, the only one I have is cost, but I don’t mind spending the money if it is truly worth it).
My dogs have always done well on kibble. The only reason I’d incorporate the raw is if I had reason to believe that it would make a big improvement in my dogs that don’t really have any problems at all. (Sorry, small poop doesn’t entice me to spend the extra money so you’ll have to do better than that). Please also include sources and personal experiences.
I was considering added raw to my dogs diet as well. Honest Kitchen is incredibly expensive, and in asking others about it, they often said that their dogs wouldn’t eat it unless they were starving. It is a mush like consistency, and is a much different experience for the dog opposed to eating actual raw meat and bones. For something so expensive, I would expect a little more.