Coffin and Navicular Bones
LF of OTTB (solar picture to right same horse)
Healthy Frog
LF of OTTB (same as radiograph)
Cold Creek Mustang - courtesy Asa Stephens
SIGNS OF HEALTHY HOOVES -

Heels are Low
Toes are Short
Heel First Landing
Heel Bulbs are Well Developed
Hoof Walls are Straight and Thick
Sole is Concave, Thick and Calloused
Works for the Limb to Which Hoof is Attached
Tight Connection from Wall to Sole (White Line)
Frog is Calloused, Dense, and Free from Infection

SIGNS OF UNHEALTHY HOOVES -
Under-run/Crushed or High/Tall and/or Contracted Heels
Stretched White Line (where sole and wall meet)
Thin and/or Brittle Hoof Wall (can't hold a shoe)
Growth Rings and/or Red Stripes in Hoof Wall
Thrush/Infected and/or Weak Frogs
Flared Walls or Cracks
Long Toes (tripping)
Imbalance/Bruising
Toe First Landing
Thin/Flat Sole
Low Heel, Short Toe, Healthy HoofwallBeautiful Functioning FrogWell Developed Heel BulbsThick Walls, Concave Sole, Strong Frog
Notice crack between heel bulbs - I was able to bury my hoof pick in there...this is THRUSH GONE CRAZY! Extremely painful, like walking on an open wound, and will definitely cause toe first landings.Foundered Welsh Pony - tall and contracted heels, growth rings indicated diet/health problems.Growth rings indicating problems with diet/health. Ringbone - P1 and P2 are fused together.