Not sure from the picture what is going on but I would definately get a better quality food to transition over to. There is a whole list of quality foods like Mazuri and Manna Pro. Also try buying a good quality dust like blue sparkle or blue cloud. It will take a while for them to look better unless there is furchewing going on, which will probably not get better. Jean sells quality items and ship very cheap this is a link to her store
www.tjschinchillasupplies.com Good luck and I'm sure other can give more insight and help. Good luck!