Thank you for your posts guys. I will stick with the Prozac for Muddy and see how it goes.
We had a very bad night last night and he barked for most of it. And when we went to let them out this morning we found that Muddy had had an accident overnight and pooped all over the floor.
Now I'm wondering if all this anxiety is over the loss of control over his bowels. He is always so good about doing his business outside and he may be stressed about having the accidents. We let the dogs out one last time just before we go to bed every night but this may not be enough anymore.

I'm going to see if there is any kind of diet that can help him. He is currently eating First Mate grain free dry kibble Chicken and Blueberry. It's a Canadian company.

He does seem confused too so maybe it's everything happening all at once to him. I feel terrible for him and for all our pets. I have a few cats who have an upper respiratory disease that lays dormant unless they are stressed. When it becomes active, they sneeze like crazy and get a fever and become lethargic for a week. They are all sneezing now because their room is located right above Muddy's and they hear him barking all night.