Many people cook frozen foods in the crock pot. And others like to reheat foods in the crock pot. Most food experts do not recommend these practices, as foods need to reach a temperature of 140 degrees within 1½ hours to prevent bacteria growth. Even if the foods do eventually reach a safe temperature & cook thoroughly, bacteria in the food can produce toxins that aren't destroyed by heat & that can make you sick. Many people have experienced food poisoning & don't even know it. They may have some digestive discomfort or feel ill for a day or two & then recover. Unfortunately, a person in a high risk group (elderly, persons with compromised immune systems, small children & pregnant women) can suffer serious consequences from food poisoning. More than 5,000 people die each year in the U.S. as a result of food poisoning. If you decide to cook frozen foods or reheat foods in the crock pot, do so at your own risk. One thing you can do is to warm the liquid used in the recipe & add it along with the frozen foods, to help raise the temperature more quickly. Taking a calculated risk may be acceptable to you as long as you know the consequences & as long as no member of your family is in a high risk group.