My dog loses a lot of hair in summer, but why doesn't it grow when it's cold now? When will it grow? thank you

First of all, you need to rule out seasonal hair loss. Under normal circumstances, most dogs will shed their hair. For example, shepherd dog, Seymour dog, Shih Tzu dog, Song Shiquan dog, Beijing dog and so on. You don't need too much hair in summer, so when the weather gets warmer, take off some old hair to adjust your body temperature. In winter, we will take off the coarse hair and put on the fluff to spend the cold winter. These are all normal phenomena. As long as the dog is groomed more every day during this period, the comb can collect dander and prevent hair from flying all over the house!

Causes and manifestations of depilation

1 Sarcoptes: It is caused by Sarcoptes or Demodex. Sarcoptes mainly occurs in the head (nose bridge, orbit, auricle and its roots), sometimes in the chest, abdomen, armpit, inner thigh and tail side, and even spreads to the whole body. The skin surface is red, with rash-like nodules and thickened subcutaneous tissue. The affected skin is depilated due to frequent scratching, rubbing and biting. Demodex mainly forms small depilation spots around the eyes, and some can spread to the whole body. The affected skin is thickened and scaly, and some may develop into pustules or suppurative dermatitis.

Tick disease: it is itchy and irritating skin caused by lice parasitism, which leads to scratching, rubbing and biting. The affected part is rough and dull, and it is easy to break and fall off. In particular, the parasitism of hair lice will cause a lot of hair loss in dogs, and a lot of hair loss will be found in places where dogs often move.

Hookworm disease: the sick dog is emaciated, the conjunctiva is pale, the fur is rough and dull, and it is easy to fall off. Hair removal spots of different sizes often appear on the back, exposing the skin, and papules or scabs appear on the skin. The sick dog's loss of appetite, vomiting, heterophilia, diarrhea and constipation appear alternately, and the feces are bloody or black with a rancid smell.

Trichophyton baldness: It is a fungal disease mainly caused by microsporum canis and Trichophyton. The course of the disease is long, and there are round or irregular bald spots on the skin, covered with gray scales, which are more common in the head, neck and limbs. In severe cases, they can be linked together and spread to most parts of the body. Sometimes accompanied by dermatitis, papules or pustules.

5 Estrogen secretion disorder: more common in adult unsterilized bitches, characterized by excessive estrogen secretion, itchy skin, depilation (generally symmetrical depilation) and pigmentation. Some sick dogs have swollen vulva and bleeding-like secretions, showing symptoms of persistent estrus.

6 acanthosis nigricans in dogs: at present, the cause is not clear, and most of them think it is related to the disorder of hormone secretion in dogs, especially in old and weak dogs. Skin symptoms are similar to estrogen secretion disorder, with symmetrical depilation, pigmentation and thickening of the skin as the main symptoms, oily exudation of the skin, but no itching symptoms.

7 vitamin deficiency: vitamin b deficiency can also cause hair loss, accompanied by symptoms such as emaciation, anorexia, general weakness, decreased vision or loss.

differential diagnosis

Except for depilation, all the above diseases have their own characteristic symptoms to distinguish them from each other. Dogs with lice disease can easily find live lice and lice eggs from the hair roots of the affected areas; Taking sarcoidosis as an example, sarcoidosis can be found in the dander at the junction of the affected area and healthy skin through a microscope; In addition to depilation, hookworm infection will be accompanied by obvious digestive tract symptoms; The depilation spots of alopecia areata are mostly round or irregular, and the surface is covered with gray scales, and its hyphae can be seen under the microscope. Estrogen imbalance is often accompanied by obvious estrus symptoms, but refuses to mate; However, acanthosis nigricans in dogs has no specific symptoms of the above diseases, and no pathogen can be detected in the dander of the affected area.

therapeutic method

1 Sarcoidosis can be treated with ivermectin, trichlorfon, waste diesel engine oil or realgar powder.

Tick diseases use ivermectin, trichlorfon, amitraz or mirex to kill lice and eggs.

3 hookworm disease can be eliminated by levamisole and avermectin.

The treatment of tinea baldness can be taken orally with griseofulvin and externally with clotrimazole ointment or dyclonine ointment.

For hormone-induced depilation, corresponding hormone therapy is generally used, such as oral testosterone propionate or megestrol acetate. If necessary, the ovaries can be removed by sterilization.

At present, there is no very effective method to treat acanthosis nigricans in dogs. Generally, symptomatic treatment, glucocorticoid dexamethasone or prednisone plus antibiotics, and the use of Chinese medicine theory to treat acanthosis nigricans have achieved good results.

Hair loss caused by vitamin B deficiency can be cured by supplementing vitamin B complex preparation.

Learn from experience

1 The symptoms of dog depilation are obvious. The key is to correctly identify the cause, treat the primary disease and treat the symptoms at the same time. If necessary, skin nutrients such as zinc sulfate and cystine can be taken orally for adjuvant treatment.

The living environment of pet dogs should be kept dry and disinfected regularly to kill pathogenic microorganisms. If necessary, pet dogs should be equipped with insect-proof collars.

Comprehensively strengthen the dog's nutrition, provide enough protein, vitamins and trace elements, and improve the dog's resistance. If depilation is found, it should be diagnosed and treated in time.

If the dog does not bask in the sun for a long time and is kept indoors all the year round, it will also cause slight hair loss all the year round. There are also some breeds of dogs, such as Spots. Although they are all short-haired varieties, it is inevitable that whenever you touch them with your hands, as long as they are sharp and hard, you will get a hand hair. You must be mentally prepared to raise such a dog!

In addition, due to the different pH values of human and dog skin, what people use will make the dog's skin dry, aged and depilated. Special shampoo for pets. If you can't buy it locally, you can choose a neutral shampoo for people, and it must be a product without essence and dandruff removal function, and you can choose a mild baby shower gel. Once itching or rash occurs, stop using it immediately.