We changed Lola from Royal Canin (breeder fed her on) to AG quite a while ago now. At first it make her coat scurfy, but now it is gleaming. I also noticed for a while that she pooped more, but this also settled down after having it for a couple of months.

Everyone asks me what I feed them on (Marius is on Adult, Lola the Puppy/Junior) as their coats are just so shiny

We changed El Vez over from Nature's Diet to Arden Grange a few weeks ago and he is thriving on it, he is on the large puppy and when we saw the vet last week he said that whatever we were doing we should keep doing it.
We have also switched the cat to Arden Grange ( since the pup is doing so well on it, why not try it) and we have seen less fur balls and her coat is really shiny.