Evolution of Horse -
Credit to Prof. C. Marsh (1879) of Yale University for complete work.
Hyrocotherium or Eohippus/Dawn Horse
60 million years
Fox/small dog size short head and neck, molars were short
The forefeet were with four complete fingers (2, 3, 4 and 5)
and one splint of first fingers and hindlimbs with three functional toes (2, 3, and 4) and 1 and 5 toes are splint.
40 million years
Modem sheep size, forelimbs had three fingers and one splint of fifth finger and hindlimbs possessed three toes, but
the middle one was longer.
Merychippus / (Miohippus)
25 million years
Size of ass, longer neck, the middle finger and toe being longer then others and supported entire body length.
Pliohippus / Toes horse (120 cm)
10 million years
Size slightly large than ass, Each fore and hindlimbs had one complete finger and toe and two splints hidden beneath
1 million years
Long head and neck, each fore and hind limbs has one finger and one toe and two splints.