We have always had a pets. But I have never run into this issue before. A couple years ago my daughter adopted a cat from the local shelter. At the time he was an indoor only cat, and over the years has become indoor/outdoor. He really enjoys being outside during the day, and will go to the door and ask to go out. This is not a problem. The problem: At night he will cry in a high pitched skull splitting yowl to be allowed out, then in, then out, then in... all night long. If you ignore him he gets destructive and keeps crying. If he is locked indoors (and wants out) he will scratch the door, yell from another room, beat on the door causing it to bang in the frame, etc... This has caused some household damage. If he is outside and wants in, he will scratch the door, the wood deck and rails, climb the screens, claw the new vinyl siding, and keep yowling. Despite everything, he will keep yowling. This is not a sound that can be ignored. He is getting more and more vocal as he gets older. He cries to tell us he is using the litter box, that he used the litter box, that he wants you in the living room with him, that he is eating dinner, etc... My husband has lost all patience with him, and its really getting to me as well. I have not had a decent night sleep this season since the snow started melting. In the winter he is quiet at night, because he does not want to go outside. So 3/4 of the year he is yowling, and its getting worse. I have taken him to the vet, and run tests to make sure nothing is wrong with him. He has a clean bill of health. He has no interest in playing. He has toys, we have a laser lights, etc... No interest from kitty. We have a large German Shepard dog, who is great with the cat. Cat has no interest in the dog for the most part. The cat loves to lay with me, or cuddle next to me on the couch. He answers to his name, and sometimes will come when I call him. As I am typing this he is curled up next to me purring like crazy, content. A couple of years ago my husband put in a cat window, it lasted a few months and we had to stop that idea. The cat loved it, but was bringing in live critters daily. He would stun the critter, bring it inside, and watch for it to wake up. Then the cat would not catch it, would ignore it as it ran around my house. I have found live snakes, squirrels, chipmunks, birds, mice, moles, and a rabbit. I cannot tolerate that. We live in a small town in the woods, and there is a never ending supply of critters to carry inside. If anyone has a suggestion, I would love to hear it. I have a soft spot in my heart for this cat, especially since she belongs to my youngest daughter who is away at college. But our health is being negatively affected by the lack of sleep for months on end. There has to be something we can do. Thank you for your suggestions.