
My young Golden has decided she too doesn't like complete foods. She was weaned on Arden Grange and happily ate it until just over 12months.
I always add either raw or some tinned meat/pilchards/sardines to evening meal, but breakfast is just complete. She started leaving breakfast first, so I added a little meat, then she was leaving her evening meal too.
She would eat the meat and clean it off the complete, putting little piles of kibble on the floor! I didn't want her to lose weight, so she is now on meat and biscuit- what a difference- she eats with real gusto. I have tried a couple of other completes and it is just no go. She is my first real fussy eater, in nearly 50 years of dogs. My other two are still happily munching their AG, plus extras.
She is thriving on her new diet (which after all is the way a lot of us fed for years) so maybe she knows something I don't! My advice would be to go with the flow! :-)