A working dog burns through energy in a way a house pet simply does not, and a food built for moderate to heavy activity is a different proposition to a standard adult recipe scaled up. Skinner's Field and Trial range is aimed specifically at that working-dog market, and this grain-free version leans on salmon rather than the more usual chicken or beef.

Salmon meat meal makes up 26.5% of the recipe and sweet potato chips a further 26%, alongside potato flake, peas, whole linseed and brewer's yeast. It also carries added glucosamine at 350mg/kg and chondroitin sulphate at 150mg/kg, aimed at joint support, plus MOS and FOS prebiotics each at 500mg/kg. Protein comes out at 25%, fat at 13%, crude ash at 9% and omega-3 at 1.41%.

• Grain-free recipe: 26.5% salmon meat meal, 26% sweet potato
• Protein 25%, fat 13%, crude ash 9%
• Omega-3 at 1.41%
• Glucosamine 350mg/kg and chondroitin sulphate 150mg/kg added
• Formulated for working dogs at moderate activity
• 15kg bag

On who this actually suits. This is described as built for dogs working at a moderate activity intensity - gundogs, agility dogs and similar - rather than a general adult recipe, so a less active pet dog does not necessarily need the higher protein and fat levels here. It is worth matching the food to the dog's actual workload rather than its size alone.

Who it's for: owners of working or highly active dogs who want a grain-free, salmon-based recipe with joint-support ingredients already built in, rather than adding a separate supplement.