Thought, fact and quote for the day 28/3/12
Seven Acre Horse Sanctuary - Giving horses/ponies a second chance..
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Thought, fact and quote for the day 28/3/12

Thought 4the day: Horses can land on their hooves! we have had many rehomed over the past few years and to be fair only 2 have ever come home. Both different yet one went to a new home within 2 weeks of being home and now the other is off on her new adventure in just under 2 weeks. Each horse deserves happiness and each horse deserves love and the ponies deserve the special love from a child that... everyone should have at somepoint in their lives. We still have many for rehoming and some not quite ready but will be soon. We do like to assess them over a 6 week period but it doesn't mean you can't ask about them and possibly meet and greet them as it could mean that after their 6 weeks with us they could be coming to you :o)
Quote 4the day: It is not how a riders horse performs; but it is how the rider and the horse perform together as one.
Sevenacre Horsesanctuary Fact 4the day: Rotation, sinking, and founder

Depending upon the severity at the onset of the pathology, there may be no movement of the coffin bone, rotation only, sinking only or a combination of both rotation and sinking, to varying extents.

Normally, the front of the third phalanx is parallel to the hoof wall and its lower surface should be roughly parallel to the ground surface. A single ...severe laminitic episode or repeated less severe episodes can, depending upon the degree of separation of dermal and epidermal laminae, lead to either Rotation or Sinking of the pedal bone, both of which result in anatomical changes in the position of the coffin bone with visible separation of the laminae colloquially known as founder.

Rotation occurs when the damage to the laminae is less severe and it will show up mainly in the toe area of the foot. The degree of rotation may be determined by severity of the initial attack or by how soon laminitis is detected and how soon actions are taken to treat the horse. A combination of forces (e.g., the tension of the deep digital flexor tendon and the weight of the horse) result in the deep digital flexor tendon, literally pulling the dorsal face of the coffin bone away from the inside of the hoofwall, which allows the coffin bone to rotate. There are also ligaments attaching the collateral cartilages to the digit, primarily in the palmar portion of the foot, possibly contributing to a difference in support from front to back. It is also theorized that the body weight of the animal contributes to rotation of the coffin bone. Rotation results in an obvious misalignment between PII (the short pastern bone) and PIII (the coffin bone). If rotation of the third phalanx continues, its tip can eventually penetrate the sole of the foot.

Sinking is less common and much more severe. It results when there is a significant failure of the interdigitation between the sensitive and insensitive laminae around the entire perimeter of the hoof. The destruction of the sensitive laminae results in the hoof wall becoming separated from the rest of the hoof. Pus may leak out at the white line or at the coronary band. In extreme cases this event allows the tip to eventually penetrate the sole of the foot. Penetration of the sole is not inherently fatal; many horses have been returned to service by aggressive treatment by a veterinarian and farrier, but the treatment is time-consuming, difficult and expensive. It is generally agreed that a severe "sinker" warrants the gravest prognosis and may, depending upon many factors, including the quality of after care, age of the horse, diet and nutrition, skill, knowledge and ability of the attending veterinarian and farrier(s), lead to euthanasia of the patient.

Hoof sagittal section with massive inflammation and rotation of third phalanx.

Causes
Laminitis has multiple causes, some of which commonly co-occur. These causes can be grouped into broad categories.
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