If the dog is in good body condition, she does not need additional food for the first three weeks. (extension2.missouri.edu)
However, there are multiple factors that can effect how we feel, which have nothing to do with additional food allergies or sensitivities and, is very commonly, overlooked. (healthbean.ca)
Unfortunately, the research is slim when it comes to individuals with celiac disease and increased risk of additional food allergies (note, this is not the same as a sensitivity). (healthbean.ca)