Readigrass and Alfa A are usually liked, you may want to add soaked (or dry if she prefers it that way) sugar beet shreds to her concentrate ration, I also feed rolled oats. If she milks well it can take her all summer to get some condition back. So slowly and steady with loads of branches as they become available will get her there in the end.
Warm water, maybe with added molasses will also induce her to drink more, and then she may also be keener on her dry food.