This section is from the book "The Farmers Ready Reference Or Hand Book Of Diseases Of Horses And Cattle", by S. C. Orr. . Also available from Amazon: The Farmer's Ready Reference;.
Hipped or "down in the hip" is when the point of the hip (anterior illiac spine) has become broken off, making that side of the hips have a drooping appearance. It is generally the result of a fall or a blow from running through a stable door and striking against a post. Treatment is not often necessary, unless an ulcer forms and then the only course is to cut down upon the loose bone and remove it. If there is no ulcer the parts may be bathed occasionally with cold water to prevent inflammation.
The hip joint, although not so liable to injury as some other parts, occasionally becomes injured from slipping upon icy roads or from stepping upon some rolling object; it is sometimes quite serious and, in cases, incurable.
Symptoms. - It is not always easily diagnosed. In trotting, the step will be rather shorter than natural and the entire leg will be brought forward with a slightly outward swing, as if consisting of one piece. There may be soreness in the joint and signs of pain upon pressure, but this is uncertain, as some horses will flinch when there is no soreness. After it has gone on for some time there will be wasting of the muscles over the joint.
Treatment. - There must be complete rest in a roomy box stall; or, if it is in the summer, he may be turned out to pasture, as he will require a long rest to grow sound. The muscles over and around the hip joint should have an application of ammoniacal liniment, well rubbed in, two or three times a day till the skin becomes sore; then a little clean lard should be rubbed on and left for a few days until the soreness is all gone from the skin, when the liniment should be repeated. The biniodide of mercury blister is used by some instead or the liniment, but I prefer the liniment. If liniment and blisters fail to relieve the lameness, either a deep seaton should be inserted or sub-cutaneous cautery may be employed, but neither of these operations should be undertaken by anyone but a competent veterinarian.