This study investigates the effects of a sulfur spa product on the skin and hair health of dogs. With the rise in environmental pollution and health threats to pet dogs, interest in natural, non-irritating skin care products for dogs has grown. The study involved 15 Maltese dogs divided into three groups: a control group only shampooed, a water group soaked in tap water post-shampoo, and a sulfur group soaked in sulfur-infused tap water post-shampoo. Measurements of skin moisture, oil, skin barrier, and pH were taken from the dogs' back and abdomen after 60 minutes of treatment over six weeks. Additionally, skin condition and hair cuticles were analyzed using microscopes. Results showed that the sulfur group had significantly higher skin moisture levels in both the back and abdomen compared to the control and water groups. While there was no significant change in skin oil levels and skin barrier, the sulfur group had the lowest skin barrier, indicating a potential reduction in trans-epidermal water loss due to the detoxified sulfur. The pH levels were within the alkaline range typical for dog skin, averaging between 5.7 and 6.5. Visual observations revealed a reduction in dead skin cells and improvements in skin cleanliness. Analysis of hair cuticles showed that sulfur positively impacts hair smoothness and elasticity.