We're getting a golden retriever puppy in about 3 weeks, when he will be 8 weeks old. We're planning on using a crate, but I'm wondering if we should also use a puppy pen, with the crate inside. We have a cat who has had no experience of dogs, and also our house has no one room that will be particularly easy to puppy-proof. I thought a pen might make it easier to keep the puppy (and the house) safe, and allow the cat to get used to the puppy at more of a distance. I would only be thinking of using the pen for a few weeks, until he is house-trained and the cat becomes used to/resigned to the puppy. Any advice would be greatly appreciated.