Alright mate i dont think they do a greyhound crunch,(i could be wrong) there is a greyhound mantainance that is 21% protein and greyhound racer is 27% protein.Iv fed working crunch in the past and the dogs have done well off it but im feeding flesh and veg now.and another thing mate i wouldnt feed dry its not good for them to digest,i wouldnt like to eat dry cream crackers for the rest of my life my guts would be f****d.Good luck