Our akita has suddenly become picky when it comes to her dog food. She is four years old and has been on the same food all this time. She has never had a problem with it before. She really liked and enjoyed it. I don't think it is a medical issue because a friend brought over a different brand and she ate that with no problem. However, the new brand is supposed to be for older dogs. Has anyone ran into this problem before and had to change the food? Any problems with the digestive system as a result of doing so? Thanks.