My two (2 1/2 and 8 months) are on mostly barf with the occasional burns kibble meal about 2 or 3 times a week. They have always just eaten whatever is put infront of them. The combination has never upset them.
Bracken was on barf from 8 weeks but I was a little cautious about bones (I shouldn't have been) and mainly gave her the raw mince with minced bone in it (from PAH) until she got her adult teeth.