kfc or any take out food is high in fat and sodium and can cause gastritis, pancreatitis and other problems; also that and switching food many times will make the dog very picky eater; so it's best to choose a healthy dog food and stick to it. i feed mine the honest kitchen force formula; dehydrated raw food ; it's easy to make and it's human grade food and dogs love it.
www.thehonestkitchen.com; u can email them and get free samples. if you want to feed the dog human food; it's best to cook boiled chicken, rice and carrots without any seasoning; or baby gerber food if he doesnt want to eat at all; i did that for a while when my dog was sick; u can use the beef, banana, apple gerber baby food; mix a bit of each with cooked oatmeal; good luck