Do feed her puppy food! Whoever told you that did not know what they were talking about. DO feed her puppy food - she's got a lot of growing to do! Do love her, spoil her - the only caution is don't let her get in the habit of running around a lot just after she eats - deep-chested dogs can develop stomach troubles - something can twist if they run around too much just after eating.

We had a Great Dane/ 1/4 Lab mix in my family. She was great! What's your new baby's name? Don't be tempted to teach her to jump up! Start simple obedience early and gently, and you should have a great dog!