Put your rottie on a grain-free diet.... Look at Raw Instint or Natures Logic... dogs do not need grains, grains turn to sugar in their systems... grain free makes for a calmer dog, too..... our friends have a wonderful rottie and two cockers, the first cocker ran ten pounds of their rott....
I was wondering if the Science Diet was having the same effect on her as my old diet had on me: too much refined white flour. Cut out the flour and refined carbs and lost 26 lbs. Sounds like it might well indeed.
Thanks for the advice -- I was going nuts trying to figure out how to get the weight off her!