Wow Betty he's growing alot! I bet he does eat you outta house and home,check out the net for dogfood formulas,you might be able to supplement his food and save some money in the long run.
Of course the trade off is more work making the food and storage!
Stuka looks abit leggy to me,ya thats likely to change somewhat as the seem to be all legs and feet as they grow.
I hope your training him every day,even if it's only for 10 minutes,the reenforcement at this age is so important!!! Oh and dont be afraid to rough house him abit,best do it while he's still young and teach him "out" means stop, sit and settle down.That is the hardest thing to teach these dogs,for years they were bred to go and ignore everything else,in fact they ignore the usual signals other dogs give when they submit.
As for eating kids,well after 30 years I've never had a single dog bite a person and these dogs should have no human aggression what so ever.....
Oh ya I figgured out why you called him stuka too.... it's the divebombs he leaves in the yard isnt it???
