I've got a 9 year old ragdoll and she has been on whiskas dry food since she was a kitten and always done very well on it. Lately it seems it doesn't agree with her and she keeps bringing it back up. Because of her breed she gets hairballs and now I'm wondering if i should put her onto senior/hairball food? If so does anyone have any experience of such? I don't mind paying more for a decent brand but i don't know what might be best. She's not over or under weight. She also has a tin of gourmet gold in two meals each day.