Dermatitis of the hips and back is a altered inflammatory traumatic origin that affects the skin of the upper zones of:

• The thighs.
• Hip.
• Queue.

The appearance of proliferative (multiplied with abundance) of the skin gives it a rough appearance that is reminiscent of the scab.

The concentration of birds around the feeders and drinkers may encourage individuals to more vigorous to go over the backs of the birds lying, harming with their nails.

This can be compounded by a implume poor. Other causes have been attributed to this problem are:

• Nerve disturbances.
• A low level of amino acids.
• The race of birds.
• The feeding programs.
• Certain medications, such as coccidiostats, cause molybdenum (Mo) deficiency.

The dermatitis is characterized by dry crusts at the base of the follicles of the feathers, and between the follicles. The lesions often join together to cover large areas. The crust consists of a mass of condensation and cell degeneration.

When the epidermis is intact, there is little inflammatory reaction in the dermis or in the subcutaneous tissue.

Broiler chickens raised on litter or in high-density cages develop skin lesions on their thighs and hips.

Gangrenous dermatitis is a serious bacterial disease of domestic poultry, typically affecting fast-growing chickens between 4 and 8 weeks of age. It is characterized by a sudden increase in mortality and lesions on the skin, subcutaneous tissue, and adjacent muscles, usually on the breast, abdomen, thighs, and wings.

It is important to recognize the characteristic lesions of the disease. At the beginning there are small pimples on the skin that soon progresses to cover larger areas.

Keep an eye on the tips of the wings for open sores or bloody spots. At first, these will be small; the upper part of the wing is easily visible when walking among the flock, and these spots indicate that the bird is not well.

In birds that have died, the lesions consist of areas reddish dark to purple to green areas on the skin. It is seen most often in the abdomen, the chest, the wings, and the legs.

It was long believed that, for the disease to develop, there had to be an initial skin wound followed by a secondary bacterial infection. However, the bacteria involved in the onset of gangrenous dermatitis cannot penetrate intact or healthy skin.

However, the bacteria can be ingested if live birds peck at infected dead birds or if the bedding and feces are contaminated.