The Barkyn EffectAnd over 4,000 5-star testimonials on Trustpilot prove it.Month 1: Consistent stools without strong odoursMonth 2: Strong, silky and shiny coatMonth 3: Improved body condition and more energyMonth 4: Stronger immune system to prevent diseaseLong-term: You may not see it but the changes are happening inside your dog's body.Trustpilot The best online-rated dog food in the world.