For a image of this area see References Â» Equine Illustrations Â» Leg Anatomy and Conformation Â» Pastern and Fetlock Anatomical Study. Swelling in any of the structures, or the connective tissues between these structures at this location would cause such a swelling, but most often enlargement of the annular ligament and/or ddf tendon would give that appearance.
Provera is available in 2.5, 5.0 and 10-milligram tablets. Many practitioners will prescribe 5 mg or 10 mg each day to induce a withdrawal bleed. Typical dosage is 1 tablet once a day for 5, 7 or 10 days as determined by your doctor.
1 Take Provera at the same time every day, with doses not more than 24 hours apart.  If you miss a dose of Provera, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.