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Herbsmith Rx Xiao Feng San is a classical Chinese herbal formula recommended by holistic veterinarians to support skin health, disperse wind, and clear damp-heat in dogs, cats, and horses. Based on the traditional formula Xiao Feng San (also known as Eliminate the Wind Powder, The Great Windkeeper, Wind Toxin Formula, and Derma Wind Release), it disperses wind, eliminates dampness, clears heat, and cools the blood. One of the most widely used formulas for skin presentations in Traditional Chinese Medicine, it is well suited for pets presenting with skin rash, hives, widespread itching, weeping or oozing skin lesions, and generalized skin irritation arising from wind-damp-heat patterns or wind invading the skin and blood level. Available as a concentrated powder mixed into food; cats and dogs use the Canine Blend, while horses use the Equine/Horse Blend. Dosing varies by species and body weight, and your authorizing veterinarian will provide specific guidance.
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For Dogs (Canine Blend Powder):
For Cats (Canine Blend Powder): ¼ tsp twice daily, or as prescribed
For Horses (Equine/Horse Blend, 1,000 lb horse): Two tablespoons twice daily for 20 days, then two tablespoons once daily in grain. If the horse initially refuses, start with a small amount mixed into grain and gradually increase until the horse is accustomed to the taste. Most horses will readily accept the herbs in their grain.
Active Ingredients: Jing Jie (Herba seu Flos Schizonepetae Tenuifoliae), Fang Feng (Radix Ledebouriellae Divaricatae), Niu Bang Zi (Fructus Arctii Lappae), Chan Tui (Periostracum Cicadae), Cang Zhu (Rhizoma Atractylodis), Ku Shen (Radix Sophorae Flavescentis), Mu Tong (Caulis Mutong), Shi Gao (Gypsum), Zhi Mu (Radix Anemarrhenae Asphodeloidis), Sheng Di Huang (Radix Rehmanniae Glutinosae), Dang Gui (Radix Angelicae Sinensis), Hei Zhi Ma (Semen Sesami Indici), Gan Cao (Radix Glycyrrhizae Uralensis)
Inactive Ingredient: Flaxseed
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Xiao Feng San is a 13-herb formula that combines wind-dispersing, dampness-drying, heat-clearing, and blood-nourishing herbs to address the full complexity of wind-damp-heat skin patterns from both the exterior and interior:
Xiao Feng San contains heat-clearing, dampness-draining, and blood-nourishing herbs including Mu Tong, Ku Shen, Shi Gao, and Dang Gui, which have significant diuretic, hepatic-metabolizing, and blood-moving properties. Mu Tong in particular warrants close veterinary monitoring in pets with pre-existing kidney conditions, and its use should be guided and duration-managed by the authorizing veterinarian. Pets currently on prescription medications should use this formula under veterinary supervision, as herb-drug interaction research in dogs and cats remains limited.
Medication categories warranting extra caution include diuretics, anticoagulant or antiplatelet medications, immunosuppressive drugs, corticosteroids or antihistamines used for skin conditions, and pets with pre-existing kidney or liver conditions. Your authorizing veterinarian can determine appropriateness based on your pet's condition, current medications, and laboratory results.
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In Traditional Chinese Veterinary Medicine, Xiao Feng San is indicated for wind-damp-heat patterns manifesting on the skin, presenting as widespread itching, skin rash, hives, weeping or oozing lesions, redness, and generalized skin irritation. It is one of the most widely used TCVM formulas for skin presentations and is a good alternative to Eliminate the Wind Powder, The Great Windkeeper, Wind Toxin Formula, and Derma Wind Release. It is appropriate for pets whose skin signs have a clear wind-damp-heat component, particularly when lesions are warm, oozing, and accompanied by intense itching that wanders or shifts location.
Mix the powder directly into food or grain at the dose recommended for your pet's species and body weight. Both dogs and cats use the Canine Blend; horses use the Equine/Horse Blend. Dogs and cats receive the formula twice daily; horses receive two tablespoons twice daily for the first 20 days, then once daily for maintenance. Your authorizing veterinarian will confirm the appropriate dose and schedule for your individual pet.
Response time varies depending on the severity and chronicity of the wind-damp-heat skin pattern. Many pets show improvement in itching intensity, lesion weeping, and skin redness within 3 to 6 weeks of consistent use. Chronic or recurring skin patterns with a significant dampness or blood deficiency component may require a longer course of treatment, and your veterinarian may recommend periodic reassessment to adjust the formula or dosing as your pet's skin responds.
Combination with complementary TCVM formulas is common in holistic veterinary practice and should be guided by your authorizing veterinarian based on your pet's full pattern diagnosis. Because this formula contains Mu Tong, which requires veterinary monitoring in pets with kidney conditions, and Ku Shen, which has hepatic metabolism considerations, veterinary oversight is especially important if your pet is on corticosteroids, antihistamines, diuretics, or has pre-existing kidney or liver conditions, to ensure the treatment plan is appropriate for your pet's overall health status.
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