If the dog has nutritional skin disease, the sick dog will have symptoms such as dry hair, easy to break and easily peel off, hemorrhage spots on the surface of the skin that are large beans or the size of a thumb cover, increased dander, and insignificant itch.

1. Causes of nutritional skin diseases in dogs:

1. This disease has certain mass, which is mostly caused by improper feeding management and digestive and absorption disorders, resulting in the deficiency of certain vitamins and trace elements. 2. Single dog food, or long-term feeding of high-protein and high-fat foods, or spoiled foods, can cause vitamin C, vitamin B, selenium, calcium, etc. to be deficient.

2. Clinical symptoms of nutritional skin diseases in dogs: 1. The sick dog's hair is dry, the hair is easy to break and fall off, there are bleeding spots on the surface of the skin that are large beans or the size of a thumb cover, and there is an increase in dander, and the itch is not obvious. 2. Skin diseases caused by fatty acid deficiency. Fatty acids are the main component of the cell membrane and have the function of synthesizing prostaglandins and preventing the loss of epithelial moisture. When essential fatty acids are lacking, in addition to the reduction in reproduction rate, it will also make skin trauma difficult to heal, increase dandruff, and form pyoderma in the skin, hair loss, edema, and wet dermatitis in the external auditory canal and toe. When unsaturated fatty acids are lacking, it is easy to cause yellow fat, and the skin forms nodules and feels painful. 3. Skin diseases caused by trace elements deficiency: zinc deficiency, the skin on the face, toes, palms and abdomen is dry and thickened, and the formation of scabs and hair loss. Especially the lesions in the oral chakra, eyelids, anus, and toe ends are the most obvious. 4. Copper deficiency, hair color changes, rough skin, hair loss, anemia, diarrhea.

III. Prevention and treatment measures for nutritional skin diseases in dogs: 1. For skin diseases caused by fatty acid deficiency, Visaccharide E can be used for treatment, with a dosage of 50 mg/kg of body weight, and is shared with corticosteroids to inhibit inflammation, with a dosage of 1 mg/kg of body weight. 2. For skin diseases caused by zinc deficiency in dogs, 200-300 mg zinc sulfate can be taken orally in mixed feed, and used for 1-2 weeks. 3. For skin diseases caused by copper deficiency in dogs, 5 mg copper sulfate/kg body weight can be taken orally.