I have a 21 week old lab and my sister who is vet and dog trainer moaned at me that when I put her to bed I must ignore all her cries and never go back to her during the whole night...even if she barked and cried all night...SORRY but I totallt disagreed with her....I wouldnt leave my children crying all night.... We took her out last thing at night and then put her straight into her crate..the second night I think she barked for about 5 mins then off to sleep.....in the first few weeks she would wake any time from 5am onwards...as soon as I heard her barking I would get up and take her outside and then once she has finished I will put her straight back in her crate...now she wakes up about 7am and as she knows I will come and let her out she only does this one yelp and then waits for me to get up and let her out.. ( at the start it would be lots of barking and yelping).... I totally believe that you need to get up and let them out but only when they bark to tell you..dont play with them etc..just straight out and then back...good luck