Sensitive skin on an animal usually gets blamed on the wrong thing — a change of food, the weather — when a fair share of the time it is the shampoo doing the irritating in the first place.

This is a concentrated shampoo built around oat proteins to calm irritated skin, with natural coconut extract and almond oil added to moisturise and condition the coat. Being concentrated, it is mixed at a 15:1 dilution ratio of water to shampoo before use rather than applied neat.

• 500ml or 5L bottle, concentrated (dilute 15:1 with water)
• Oat protein to soothe sensitive skin
• Coconut extract and almond oil for coat conditioning
• Paraben, silicone, phthalate, alcohol, sorbate, phosphate and DEA free
• Vegan-friendly and gluten free
• Formulated for all animal hair types, including horses, dogs, cattle, goats, llamas, alpacas, rabbits and ferrets

On the dilution. Because this is a 15:1 concentrate rather than a ready-to-use shampoo, one 500ML bottle goes a long way further than the bottle size suggests — but it also means you need to actually measure the dilution rather than pouring it on neat, and Wahl do not publish the exact quantity of diluted shampoo the bottle yields.

Who it's for: owners of an animal with genuinely sensitive skin — not just a dog, since Wahl formulate this across species from horses to rabbits — who want a shampoo built to avoid common irritants rather than mask a reaction with fragrance.