Is it bad for a dog to be shut up in a 15' by 15' fenced in area, alone, for a week with no human interaction?

This dog has food, water and shelter. Even so, its been extremely hot out. 95 to 100 degrees.Theres also been some severe storms. the dog paces nervously when I come over to give it water. I am not allowed to let him out.he has bit someone before. I just put a hose in to make sure he has water. He has an automatic feeder full of food in there.He's not so bad that they can't be around him. I have seen the dog recently run around the front yard for about a minute. I think he just has potential to bite. The dogs demeaner seems playful and sweet at times(seeing him from across the street) but when he's in the fenced in area he paces and seems off. Only way I can think to describe it. just feel like somethings not right with the dog. Probably why they have him back there. I feel bad for this dog but I'm not sure if I'm worried about nothing.The caged in thing just seems bad for him but I think the owners feel they have no other choice. They are nice people. I don't believe they would ever intentionally mistreat there dog. I just wonder if they may not realize it.They probably do spend time with it and play with him in the backyard and take him places for all I know. Sense I know for sure the dog is going to be caged up for at least a week now and its so god awful hot out I feel like its not quite right. The dog does have shelter from the sun and two buckets of water and food. Its just a tiny area with no human or animal interaction except when I come over to make sure his water is full. I can't even pet him or let him out to run for fear he may unexpectedly get aggressive. Is this bad for a dog?