This is my first time posting an answer on here, so I hope i'm doing this correctly- but I wanted to at least answer your question and ask some questions as well. If you don't mind me asking, what do you mean by "screaming"? There's a big difference between a scream from being in pain and one from separation anxiety/fear. It does sound different, and to be honest, most dogs do the opposite when they are in pain, as they get quiet. There's a lot to go over in your question so forgive me if I don't address everything, but I will try my best. I first want to say that I feel for you, and that i'm sorry that you and your husband are having to deal with this frustrating behavior. It's terrible to be kept up at night by it, and I can say I've had first hand experience with what you are talking about. With two different dogs. Without seeing your dog, and knowing that you have taken him to the vet and have done everything you can for him, I can at least assume this is not pain related. However, you mentioned that he has been on numerous medication for years, and that concerns me. Either they know or don't know if it is a UTI, and you shouldn't have to pay over and over for different medication. It's not good for you, and it's not good for him.

On another note, any vet that tells you that they are just seeking attention and gives you antibiotics is a vet you do not need to see. In our case, and to keep the story as short as possible, I will say that long story short, our pup broke his nail. He was limping, constantly licking, and we took him to all vets within the area and outside of it. When I say all of them, I do mean all of them. They said he was licking because he wanted attention, but gave us antibiotics anyway. Eventually, one vet realized the nail was completely gone and removed it. Should have been the last of the problem, and of course the vet here said to give him time to stop licking, but we were smart and noticed he was still licking his foot, and were still bothered by it. He started growing some kind of lump on his toe, and this was the last straw for us. We drove him 5 hours up the state to see an old vet of ours before we moved, and discovered it was cancer. His toe was removed, and because we caught it so early and paid so much attention to him, he is going to be fine. He no longer licks, or minds his foot. In fact, he jumps and runs better than he has in a long time.

I'm not telling you this to scare you ... (more)