It's not abnormal, no. My 4 never had issues when I used to switch, but I really think it's unique to each dog. If the softness doesn't clear up, I'd then consider a different food. With your new food, did you stay within the same/similar protein and carb source?
__________________ ~ A friend told me I was delusional. I nearly fell off my unicorn. ~ °¨¨¨°ºOº°¨¨¨° Ann | Pfeiffer | Marcel Verdel Purcell | Wylie | Artie °¨¨¨°ºOº°¨¨¨° |