[Yorkieluv]

Poor Davey...I'm so sorry that he is so sick. What kind of protocol do you have him on for the liver other than the k/d?
In order for you to be able to see a difference in him, he should absolutely be on:

lactulose 3x/day (dosage will depend on your baby having 2 soft stools per day), canned L/D instead of K/D (even though K/D is lower in protein, it's not the appropriate kind of protein..It contains pork liver which is not only an animal protein, it's also an organ meat which is highly encephalogenic...It produces a LOT of ammonia that a compromised liver cannot filter), and supplements like Denosyl and Milk thistle which help not only protect the liver, but also helps regenerate the liver.
Also, small, frequent meals should be given rather than free feeding or feeding 2 regular meals. 4-6 little meals per day are preferred because it helps lighten the load on the liver and helps the dog tolerate more protein *overall*...
These recommendations have helped dogs in even the most severe conditions. Depending on the severity of your dog's condition, you might need to add other things to those basic recommendations I mentioned above.
I am just sharing what has worked for my dog and other dogs that I have helped.

Prayers for Davey!!