My 1 year old horse field won't open his eyes he won't eat and hasn't pooed for days now. Took him the vets and was told he might have substrate in his eyes was prescribed eye drops loxicom for pain relief and he had a antibiotic injection bat the vets it's been 3 days since seeing the vet and all he's doing is sleeping. I've been bathing his eye with cooled boiled water and giving him bath soaks once a day he still won't eye and he still can't open his eyes any ideas?