Some people worry about feeding their dog pork. Often it's because it's thought that pork is not safe because of meat's association with the trichinella parasite. Dog food manufacturers like Henley Raw Dog Food (and the other brands on this site) are required to batch test their products to pick up things like parasites and bacteria to ensure they are safe for our dogs. In case of the trichinella parasite, it can't withstand the deep freeze. 
Dog Meats Bone rating using the All About Dog Food ratings calculator
Analytical Declarations: Fat 15.6%, Moisture 64.5%, Ash 1.5%, Fibre <0.5%, Protein 19.4%
Size: 1kg