The only time a crate is detrimental to your dog is if your dog is terrified of it and you shove your dog in there frequently or if you lock your dog in there all the time, for hours on end as a punishment. When a crate is used responsibly, it is safe and the dogs like it. We adopted three rescue dogs and all of them are crate trained. They sleep in their crate at night. They go to their crate to take a nap when they feel like it. There is nothing wrong with having a safe space for your dog. If my dogs did not like the crates, I would not use them. But my dogs like it and it keeps them safe while I am not home which is very rarely. This Amazon brand crate works great. Had no problems with it.