My gr, nearly 3 years old, has been eating Waitrose kibble for the past year or so, but they have discontinued it. I emailed them to ask who is the manufacturer (in case it is really "Bakers" or whatever) but they wouldn't tell me.
Dog isn't really food orientated and is a bit indifferent to kibble anyway. I have to put a dollop of wet food on the top to get him to eat it. Today, for example, he hasn't eaten his breakfast. I know, I know, but he does love human food - particularly toast and crumpets
and likes nothing better than when we come in from a walk and have toast and coffee together (well, he doesn't have the coffee!).
When he was young he had Royal Canin, but after a while refused to eat it. I tried a few other brands but he wasn't keen on most and one - James Wellbeloved - he actually retched and ran off.
Please don't suggest raw food.