Hi Gabrielle-
Sounds to me like you may be used to smaller dogs! Especially between those 2 breeds mixed together, she will not be done growing by 7 months. With large breeds it is recommended to feed a large breed puppy formula up to 18 months of age to play it safe and make sure they grow correctly. Eukanuba Large Breed Puppy is a good choice and I would personally keep her on that food. This food has been feed trialed with large breeds as well which is a plus. I understand your concern about her dropping weight, however it is far better for a LBP to be a little underweight than overweight by even a few pounds.
What has the vet said about her growth?
