The Denosyl that entirelypets.com sells is the same
Many people use this one....Make sure you give this on an empty stomach, preferably in the morning, at least one hour before eating. If you don't give it on an empty stomach, it is as good as not giving the pill at all because it can't do it's job.
You might want to try hepatosupport instead of just plain milk thistle since hepatosupport also contains vitamin b's. Many people have used this on their MVD dogs with great success.
How is Max doing?? Is he having any seizures? lethargy?