Hi Ashley-
Congrats on the new puppy!
The good news is your puppy does not have a sensitive stomach. Whenever you first get a puppy it is important to keep them on the same food the breeder was feeding for 3-4 weeks. Although we try our best to make them feel at home and comfortable, a move to a new environment is stressful for young dogs and sudden changes in diet can cause stomach upset like you’re experiencing. Only transitioning from Puppy Chow to Pro Plan for 2 days is not long enough and plus it was done too soon.
She will need to go back on Puppy Chow for 3-4 weeks and then you can begin a 7-10 day transition over to Pro Plan Large Breed Puppy again. I would not recommend a second diet change (to Fromm) in such a short amount of time. It will not help. Pro Plan Large Breed Puppy is an excellent food, she just needed more time to adjust to her new home and family before switching to another food.
