What nutritional differences exist between raw food and processed food for dogs and cats?

Research Questions
Why is raw food for cats and dogs better than processed food?
What nutritional differences exist between raw food and processed food for dogs and cats?
Research Methodology
In order to tackle the research question, concrete evidence should be collected from the community about existing pet food products. This information can be retrieved directly through interviewing residents who possess pets, veterinary officers, and manufacturers. Additionally, the internet and websites promoting different products can be rich in details of these products. Other sources include books, journals and materials such as research documents released by relevant government departments. Although some of these sources require authorization such as quoting certain brands, the research is expected to run smoothly due to the magnitude of its weight and value to the society.
The data to be collected mainly focuses on the content of pet food products, their nutritional value, the recommended daily amounts for a pet, benefits and side effects. This information is intended to promote responsible production processes as well as consumer sensitization. In order to exhaust the subject matter and come up with noteworthy findings, a combination of secondary and primary methods will be employed. The advantage of this is that the information about the subject matter is exhausted. Secondary sources refer to those resources that have discussed the subject matter and represented it in the form of print or electronic media. Secondary methods to be employed will include resources such as journal articles, books, study articles, periodicals, magazines, newspapers and the Internet. Information about raw versus processed pet food has been studied for years and the findings have been represented in these secondary media. Before getting first hand information about the subject matter, it is important to understand what is known about the study topic.