Tinned food doesn’t have the risks of sealed packs, and having tried nearly everything new trend over the last twenty years, I and dogs are very happy with Butchers. All about dog food rates it very highly, simple ingredients, several options like meat type , grain free, low fat etc. Offal is listed. Mine love it, the vet always compliments on their condition. Also it is about realistically priced, 50-70 pence.
The lists of herbs in some foods are a bit of a con, the tiny amounts have no health effect in my opinion.