I know some do it, but I am very much against crating a dog for 8-10 hours a day. That is jus too long for them to not get any exercise at all. Of course they are active at night -- they a being forced to sleep all day for lack of the opportunity to do anything else. I would definately invest in some expens or better yet, a gate and let them have at least one room of the house if you don't think they are able to free roam yet.
Yorkies ar every people-oriented pups -- they crave interaction. If you cannot be with them, doggy daycare is an excellent idea. If that is not possible, then they need more room to get out and about. They need enough space to work up to a run. That way they can chase each other, play with some toys and get that much needed exercise. You will probably find a completely different pair of pups at night! If they are getting more exercise during the day, then it would not be bad to crate them at night. But I would not add another 8-10 hours of crating to their already 8-10 daytime hours. That is just WAY TOO MUCH. |