Ruby had Arden Grange for a long time, but then she seemed to go off it and wasn't really eating much. After a bit of research (mostly on here) we tried her on Harringtons which is available at most supermarkets, seemed a pretty good quality and quite a bit cheaper than Arden Grange (not that price was a major issue, we just wanted her to eat!) She loved it and still does, firm poos usually twice a day. She is now 19 months old and is healthy and thriving. They have a website so may be worth a look. As others have said, I wouldn't change food at the moment but it could be an option in the future.