I am so sorry. I too lost my very best friend on March 5th. I had been feeding him contaminated pet food. I still cry but it does seem to get better. You loved your dear Max, and animals are human--they know. You did what you did out of love. If you had tried to keep him alive, knowing how much he was suffering, that would have been for you. You did the right thing. You are in my thoughts and prayers.