Some cats are perfectly happy being "indoor apartment cats". If you don't mind cat box duties, they can adapt really well. I think cats fantasize. Probably about hunting, chasing, and escaping, in my cat's case. My dining room opens to my living room which opens to the hallway leading to bedrooms. Sometimes, for no apparent reason, he'll just run at full speed across the dining room, leap over the living room couch, pushing off the top of the back rest part in mid-leap, land halfway across the living room, and run at full speed down the hallway into one of the bedrooms. Then .... he peeks out around the edge of the bedroom doorway, eyes wide, ears flattened. My wife and I just look at each other with that WTF look. Today about 2 pm I took a nap. Of course, he curled up in his place between my knees. I got back up at 3 and let him out in the back yard to go terrorize flying insects. About 4:15 he's pawing at the French door to the back yard wanting to be let in. So I let him in and went to my study. He followed me there, laid down on the floor below me. You see, it's after 4 pm, and he doesn't let me out of his sight starting at about 4 pm. Around 4:30 I started talking to him, and he immediately went into his roley-poley routine. "Look at me! I'm right here! Don't forget!" I took pictures. About 4:45 pm I stood up, and he went from his back to his feet in like a tenth of second, ran out of my study, stopped, turned and looked to see if I was coming. I was. He ran up the hallway another 10 feet, stopped and turned to see if I was still coming. I was. Yay! And he hurriedly trotted ahead of me to the kitchen. Fancy Feast time!