Well your pup is telling you, "I wanna come out!!!" No pups/dogs like being caged. There's so much more better things to do outside of her cage. What you could do it to leave some toys in there for her. She will eventually get bored of it sooner or later but it will help to keep her a bit occupied. Get other toys but don't give it to her yet until she's bore of the precious one. Keep exchanging everyday. Keep her busy! Give her something to chew too. What about a Kong? Have you heard of that to before? This toy will keep your pup occupied the whole day. Just insert some peanut butter or cheese or whatever she likes inside of it & give it to her just before you guys go to bed. Hopefully this will help.

whenever she bark, never let her out...that's d most important point..or else, she will thought barking will be rewarded...

try caging her up for short period of time 1st.....let her out every 1 or 2 hours, if u can....

n bring her for long walk to make her exhausted, then she'll hv a good nap during the night....

my 3 years old dog can now cage up for maximum of 10 hours, without making a single noise...all u need is just more time n practise...

for any big breeds like rotty or even GSD they will have tons of energy to burn. but they are very smart breeds. chances are, your puppy has learnt that morning you'll leave, and day time you'll come back to let your puppy out.

believe it or not, a fixed routine is actually better for your puppy as this will make them feel more secure knowing when they'll see you compared to random intervals when u pop up on them. as long as they know, "ok it's time to go back into the cage" then u go out for work. and in the evening your gate opens "OMG daddy mummy's back!" and the excitement begins.

any puppy will bark or whine to get your attention. be glad. if they detroy things to get your attention you'll cry. use this as a training tool. what i'd tried but not guranteed. my pup used to bark a lot too especially when i come home. what i did was totally ignore the pup for the first 10 minutes or until he quiets down. at first the moment he quiets down i'll open the door and give him his dinner after some praises. as time goes by, he is staying quiet for longer periods before he gets his food. Now, he gives 1 bark to either greet me, or to notify me someone is at the door. all you need is a little patience and lots of dedication and consistency.

you can groom your dog to act the way u want him to be. be it your door bell or your alarm. don't take the barking as a bad sign, instead use it to your benefit. tune your dog's thinking to do what u want instead of forcing your pup to do something it doesn't want to. :D