CJ (11 weeks old) and Stella Mae (6 years old) eat each others food. We have seperated them, stood over them and even fed Stella outside and CJ inside but to no avail. They are both eating Neutro. Stella Mae eats a sensitive stomach product and CJ eats the large breed puppy. Neither one has had problems with digestion yet. So the main question is will the adult food make problems for CJ and will the puppy food make problems for Stella?