Struggling but brave foal

We are struggling with this one.
This little colt foal lost his mother at birth. Apparently he's four months old, but you wouldn't know it. Goodness knows what the owner was feeding him on - but he brought him into us at the Casablanca clinic a couple of days ago.
Galloping squitters and severe dehydration - hence the drip.
They say he looks a bit better already.
Hmmm. Not sure. Horses are just not as tough as donkeys - and they all need a bit of fight in them - the will to live.
Poor little scrap - it looks touch and go to me.