If you use appropriate responses to the night time outings, you shouldn't have a problem. As the pup gets older, its bladder grows and it develops stronger control over elimination muscles. Generally, a well exercised dog will want to sleep through the night.
Originally Posted by shippers
Generally, if the pup whines to go out, you take the pup out. If the pup eliminates, you treat/praise. Personally, I would praise gently and calmly; I would pick the pup up and cuddle it, whereas during the day I would jump and be all crazy. The gentler praise helps to keep the pup from getting all wound up. I'd bring the pup in and put it back into the crate, and the pup would calm down and go back to sleep.
If the pup does NOT eliminate after a reasonable amount of time, I would not talk to it AT ALL. The pup would be immediately returned to the kennel. There should be NO interaction between you and the pup, so the dog learns that there's nothing to gain from pretending to need to go out.
Cedar (tri), Willow (blen), & Holly (ruby)