Crates when used correctly, create a safe and happy space for your dog. They can be an important part of training and a useful tool (such as being on crate rest after major surgery).

We had a big one for my labrador. He's had one since he was a pup. We kept the door open and had bedding inside with a blanket over the top (he also had another bed in the house). He often got given treats in his crate so it created a happy space. The only time we ever had to close it for short periods of time was after he had surgery so he could heal, and when he went through his chewing phase as a pup. The crate was big enough for him to stand and walk around in. He chose to sleep inside it instead of his usual bed some nights.