You have to be careful with homecooking on your own. Each pup has different requirements and it is not just about size! Bubbles has medical issues that require a RX diet. You could try to top the food with chicken but my guess is she will just eat the chicken. If you cannot get her to eat the dog food, I suggest you do a consult with a board certified vet nutritionist for a home cooked diet. That way you know she is getting exactly what she needs. I had a pup in renal failure a few years ago and I home cooked for him...he loved it and he did very well on it.
You can find a vet nutritionist at:
American College of Veterinary Nutrition
Or, you can consult with Dr. Remillard online/telephone:
Welcome to Pet Diets Quite a few YTers use her.