it looks terrible, but i have healed up worse! alternate furazone under wrap one day, wash with running water daily, leave open to air with wonder dust or scarlet oil(flies stay away from scarlet oil). it has to fill in with granulation tissue. can't tell from pics, but just might be sore. Did horse walk on it right after getting hurt? if he did you should be ok. it is swollen and painful. the key is hydrotherapy, good old garden hose, whatever it takes to get it done, build a chute to hold horse still if necessary. good luck