Science Diet recently acquired a patent for polyethylene, which is a plastic.
Science Diet Acquires Patent to Use Polyethylene
Science Diet has recently acquired a patent to use polyethylene in their products. The purpose is to extend the shelf life of their products. Polyethylene is a common plastic that is widely used to create plastic bottles, plastic bags, plastic films, and many more products. Using this plastic in food could be dangerous for you and your pets. Many people are not aware of the potential side effects. It is possible that polyethylene products can cause cancer.
Susan Thixton (Truth about pet foods) wrote about it recently on her site.
Plastic Coated Pet Food Kibble?
While I admire Science Diet trying to keep up with the premium kibble companies and listening to consumers complaints about by products, etc. I still wouldn't trust the company. They have a very clever marketing campaign which makes them look sincere and concerned about providing nutritious foods for pets. However, I would never feed their products.