Worst dog mom!! 😭

I absolutely hate myself right now!! I took my sweet almost 2 year old puppy to the vet today and found out that I have been feeding her wrong and pretty much starving her! I have been told to up her food intake and pack her with carbs such as pasta in controlled amounts and with that should come better exercise. I feel so bad for what I was doing to her! I researched her breed before getting her and must have read the wrong food amount to give her. I am the worst fur mom. Maybe I shouldn't be an actual mom yet....

* She eats Beniful and was getting 4 cups in the morning and 4 cups at night. She needs to be getting 6 cups morning and night. She is a Dane and is active.