Do NOT ever feed puppy food of any kind, not even large breed to a Dane puppy...to do so can cause some very serious growth problems. Do NOT feed a low quality food such as Beneful to any dog, especially a Dane..Beneful does NOT fullfil ANY of the necassary requirements.
I don't care if 20 vets said it was ok to feed Beneful..it is a very low quality food!! I have worked for/with vets for 36 years I have the utmost respect for most and admire their medical knowledge, however very few vets have any knowledge of nutrition & feeding especially when it comes to giant breeds such as Danes. Vets only get general nutrition classes in school that cover everything from cats to rats, dogs to hogs.
Get this puppy off puppy food now and get it off the Beneful..get this puppy on a good quality food one that contains meat....meat as at least the first 2-3 ingredients and that doesn't contain corn, wheat or soy...you are feeding a dog, a carnivore, not a goat.
Get this puppy on a good quality adult food of not more then 24% protein such as Canidae ALS,Chicken Soup for the Dog Lover's Soul Regular Adult or Large Breed Adult, Wellness Super5 Mix Chicken, California Natural, Merrick just to name a few.
A good quality adult food has all of the nutrition your growing Dane puppy needs. It has the right amount of calcium, protein & fat.
An 8 week old Dane puppy should weigh from 18 - 27 # and be from 13" - 17" tall. Your puppy should be fed 3 times per day at this point. You should be feeding @ 1 1/2 cups dry food per feeding and you can mix taht with a bit of warm water and a couple of spoons of a good quality wet food.
5+ cups is not in excess at all when you are feeding such a low quality food.Actually it should be more and for an adult Dane you could be looking at 12 -14 cups of this cheap food daily just to try to maintain a proper weight. it takes up to 3 times as much of a cheap food for a dog to get proper nutrition then it does from a good quality food.
I feed my Danes Chicken Soup for the Dog Lover's Soul Large Breed Adult....they only get 4 cups per day of the dry..2 am, 2 pm plus 1/3 can of wet am & pm. My show pup was raised on it and even as a young puppy never ate more then 5 cups total per day...he was 22.7 # at 7 weeks of age.
I suggest that you join some of the Dane groups so you can learn how to correctly feed & raise your Dane puppy.
http://www.danetalkers.org http://dolforum.com http://leansnslobbers.proboards92.com http://pets.groups.yahoo.com/group/premieregreatdaneclub http://pets.groups.yahoo.com/group/greatdanelovers