All 7 of my dogs are on Chudleys Working crunch, they do really well on it, keeping the Danes weight on, they have tripe, rabbit etc.. fed with it though. I highly recommend it, and its a reasonable at £13 a bag, when your buying 20 bags at a time.
I have started to use it as some of my dogs have gone off of their normal food. They love it and it does seem to help keep weight on my boy. Give it a trial is my advice.
I looked at the ingriedients of Chudleys working crunch and it said protein 24% didnt say what the protein was made up of though which I like to know, the price though is very good.
I was just interested as to what it was like after seeing it advertised on tv so much,i see its made by dobsom and horrall,they have been producing feeds for a very long time.
I think a lot of food is trial and error, what suits mine may not suit yours, always good to ask the company for a sample to see if yours will eat it before commiting to buying a sack.