It is a meal specifically for working dogs. Both of my labs get it. They get the high protein version during the shooting season and a lower protein level one during the rest of the year
Ours were brought up on James Wellbeloved. Right now they're on Pascoe's Country Complete which doesn't aggravate their food intolerances (thinking about converting them to a raw diet)
Our oldie who's 14 is on Hills J/D light to help her poor old creaky joints without putting on weight
My black lab is on pedigree meat and mixer, yellow lab has sensitive digestion system, after lots of various expensive vet mixes she is now very happy on Chappie!
I fed Chudleighs Working Crunch for years but for some reason have started feeding Skinners Field and Trail Maintenance which seems to have enough protein to keep them full of health through the working season.
I don't think my lab cares what he eats as long as there is plenty of it - he really is the greediest dog! He eats so fast he is retching and gulping at the same time - its disgusting!!