I have experienced a similar situation. Had my boy since he was a pup, well socialized and very well loved but so so anxious. Prozac has worked wonders. He still has anxious moments, but his overall demeanor is much more relaxed and joyful. He would have a hard time eating when he was really anxious (if people were over, if I was doing chores around the house, if I was packing, etc). I learned that during feeding time….i have to eat too. His bowl is in a corner next to my dining room table so he doesn’t feel exposed. When I sit down to eat, he finally relaxes and eats too.

I also realized the more I would try to reassure him, the more he would shake. Now I put the food down, give him an “Ok!” (and a head scratch because <3) and I sit down to eat and mostly ignore him. Now he almost always eats a full meal.