A Complementary Pet Food for Dogs. Making dog's tails waggle is second nature here at Good Boy. We produce really exciting, yummy treats to keep your dog happy as well as entertained. These Tender Beef Fillets are made with super duper succulent natural beef so are sure to become one of your dog's favourite treats. Having been roasted in their own natural juices to preserve the real beef meat flavour, these tasty fillets don't contain any artificial colours, flavours or preservatives. And as well as being lip smackingly tasty, they're healthy too with only 2% fat.