Doesn't sound good!
I looked up some website about how to naturally heal a liver. I'm not sure what good they'll do... But maybe something will pop out. Most natural remedies won't do anything to the dog, where as medicine can harm the dog. Before you decide to treat in any way, I would talk to a vet. Sometimes if the vet is at a loss, and you present some of your own research, they can look into it and tell you whether the remedy will work for your situation..
Home Remedies and Natural Supplements to Treat Liver Disease in your Cat or Dog. -- Milk thistle treatment. On the right hand side, there is a panal that show ingredients and what do
Dog Health Liver -- Maybe your dog has liver disease?
Best Way - Natural Remedies for Dogs With Liver Problems | eHow.com -- Another site that promotes Milk Thistle
Symptoms and treatments of liver disease in dogs - by Teris - Helium -- Another point of view on Milk Thistle
Get your pup on a good quality food. Maybe try canned food for awhile to give her some nutrients. You can also soak the hard kibbled food in warm water and try and feed her that way. The nutrical is giving her some nutrients, but not all of it! I do hope you looked into a different type of food other than Beneful. If your dog is having issues with the liver, beneful will definatley make it worse or at least prevent her from getting better.