-1 echoes of the beast (wide-angle senses: +1 alertness vs. surprise; a horse can see approximately 350 degrees)
-1 claws
-2 inhuman strength
-2 inhuman speed
-4 supernatural recovery
+3 catch
-1 run like the wind: +2 athletics when sprinting
-1 beast of burden: +2 might for moving stuff
-1 paranoid? probably: +2 alertness vs. surprise

(unspent: +1)
+5: athletics, alertness, endurance
+4: empathy, fists, lore
+3: conviction, might, scholarship, rapport
+2: investigation, deceit, discipline, survival
+1: performance, stealth, contacts, presence

details on individual forms:
arabian, female, mahogany bay.
percheron, male, pure black - +2 might, -1 athletics, -1 empathy; the percheron is a heavier draft breed