hi i no that dog food companies want me to buy them but i dont fool for all of them only about 3 which are orijen burns and nater diet which i like cas it has lambs tripe in it. only good qulity holistic i have one dog 10 yr old chi jack cross and she was one pedigree which battersa told me to feed her six years ago then i found out pedigree was rubbish and did raw now i feed mainly burns tinned lamb rice and veg with chicken fish rice veg biscuits burns ones and nature diet and orijen somtims as i like to change her food eg burns dont have tripe nater diet do nater diet dont have eggs orijen dose so we rotate it so gets goodness from all of them.