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P

 
      P3: third phalanx. See coffin bone.
     
      paddle: type of movement in which the lower front leg swings outward.
      Often associated with toe-in conformation.
     
      paint: counter-irritant used to increase blood supply and blood flow and
      to promote healing in the leg. A mild form of blistering.
     
      palmar: back of front limb from knee down.
     
      parrot mouth: an extreme overbite.
     
      pastern: the area between fetlock joint and hoof. It comprises the long
      (P1) and short (P2) pastern bones and the pastern joint.
     
      pedal bone: see coffin bone.
     
      pemphigus foliaceus: a skin disorder caused by the body's immune system
      mistakenly attacking some of its own cells involved in skin production.
      Signs may include the formation of blisters and pustules that break open
      and form crusted sores. Lesions generally start on the horse's face and
      limbs, eventually spreading to the rest of the body. There is no cure, but
      treatment can control the lesions and cause the disorder to go into
      remission. Treatment may involve suppression of the immune system by
      administration of systemic corticosteroids.
     
      periostitis: inflammation of tissue (periosteum) that overlies bone.
      Periostitis of the cannon bone is referred to as bucked shins, while
      periostitis of the splint bone is called a splint. May be heard in the
      expression "Popped a splint."
     
      phenylbutazolidan: see bute.
     
      phenylbutazone: see bute.
     
      physis (plural, physes): the "growth plate" at the end of the long bones
      (such as the cannon bone) that lets the bone grow.
     
      physitis: an inflammation in the growth plate (physis) at the ends of the
      long bones (such as the cannon bone) in young animals. Symptoms include
      swelling, tenderness and heat. Although the exact cause is unknown,
      contributing factors seem to be high caloric intake (either from grian or
      a heavily lactating mare) and a fast growth rate.
     
      pigeon fever: infection of a bacteria, causing one or more lumps beneath
      the skin the horse's brisket and lower abdominal area. Treatment may
      include the application of hot packs and/or poultices to draw out
      infection and/or lancing the abscesses. Antibiotics may also be prescribed
      after abscesses have been lanced.
     
      pin firing: thermocautery used to increase blood flow to leg, thereby
      promoting healing.
     
      pinhooker: a person who buys horses, cattle, etc. with the specific
      intention of re-selling it at a profit.
     
      pipe-opener: exercise at brisk speed.
     
      Piroplasmosis (or equine babesiosis, "piro" or horse tick fever): a
      tick-borne disease caused by blood parasites. Acute signs include fever,
      anemia, jaundice and swelling of the legs, chest and abdomen. The disease
      is ultimately resolved through treatment, natural body defenses or death.
      Horses in the United States are largely unexposed and are therefore
      susceptible to the disease, while many European horses are symptomatic
      carriers.
     
      plantar: back of the hind limb from the hock down.
     
      poll: the top of the head, between the ears.
     
      polysulfated glycosaminoglycan (PSGAG): an anti-inflammatory agent used by
      intra-articular injection in the therapy of traumatic and degenerative
      arthritis in horses.
     
     popped a splint: see periostitis.
     
     posterior: situated toward the rear of the horse’s body.
    
      Potomac Horse Fever (PHF): protozoal infection of the intestinal tract
      usually causing diarrhea, fever, depression and colic. Treatment is
      generally supportive and administration of appropriate antibiotics, along
      with preventive measures to avoid the development of laminitis, a common
      sequel to PHF. 
   
     poultice: a soft, mushy dressing, made of a mixture of dry, absorbent 
     substances with liquid or oil, applied to wounds or swellings to soften, 
     relax or stimulate the tissues or reduce swelling.
    
    prep: a workout used to prepare a horse for a competition.
   
    prop: when a horse suddenly stops moving by digging its front feet in to 
    the ground.
 
    proud flesh: an overgrowth of pink, bubbly-looking tissue during healing 
    of certain flesh wounds. It can protrude from the injury site like a 
    tumor, preventing new skin from covering the wound. Treatment depends on 
    location and severity, and will usually include one or more of the 
    following: topical application of various medications designed to melt 
    away the excessive tissue, pressure bandages and/or surgical removal of 
     proud flesh.
 
     pull up: to stop or slow a horse during a workout.
    
     pulled suspensory: strain of the suspensory ligament (suspensory desmitis) 
     in which some portion of the fibers of the ligament have been disrupted. 
     Depending on severity, there may be loss of support of the fetlock joint.