Hello! I know your post was a year ago, but I thought my experience might help you, too. I have found in my senior dog that feeding him oatmeal with every meal is helping his bowel issues. Without it, he has diarrhea, and with it, he does great, and he seems so much happier. He just feels better.

He takes amitriptyline for his anxiety and nerve pain, but he did take Anipryl, and it worked wonders when he was on it (for about three years). My vet says that Prozac also is great. You have to do what works in these kinds of drugs because they do keep the dog happier. However, you can add some natural aids like the Calming Moments pills or Rescue Remedy for Pets. They do help to calm my old man down quite a bit.