If she has not eaten anything else, I would deduct that it is the food. I would try the pepcid and with loose stools pumpkin.
Gosh, Noelle is having tummy problems, too.
As for the Pepcid AC ... Snowball is taking 1/4 tab twice a day ... just for now. But, I would check with your vet to make sure that is okay with Noelle.
I hope Noelle is feeling better soon. Please keep us updated, Debbie.
Hugs for you and Noelle.