I had mine on Pedigree Better by Nature and mixer, which they liked but decided to change after reading that it contained lots of additives and preservatives.
I've just switched to Arden Grange, which we use in addition to leftovers from our meals, such as chicken and carrots and sometimes fish. They seem to love it, which I'm relieved about as they were on James Wellbeloved as pups and really weren't that keen on it.