I have a 9 week old Shiba Inu, and she whines really bad when she is in her excercise pen. We have taken the front door to her crate off and that is in her pen to sleep. The pen has more room in it so I would think she could enjoy the extra space at night when we are asleep. The only problem is she will whine and wake everyone up in the house.
I take her out shortly before we all go to bed and wear her out! We run all around the yard until she is panting and is obviously tired. I then take her back in and put her in the excercise pen with her crate and some water. She will eventually go into her crate and go to sleep without much fuss since she is tired, but within a couple of hours she is up whining and howling. We have tried ignoring her but she will not stop. I eventually have to get up and put her in her crate and close the door. I also have to put her in our laundry room and put a towel over the crate. She will continue to whine and howl in the laundry room but at least it isn't as loud and we can all get some sleep.