Yes, I have had foals as bad, if not worse than that.
The first time, I freaked, completely, don't mind admitting it!!
It was not my mare and she foaled nine weeks early, so I had to have the Vet.
Was advised to keep her in, limit movement and make sure she got plenty to drink / eat.
Which is what I did.
I would never leave a foal like this to "get on with it" as it were, they definitely need IgG levels tested, and possibly even vitamin injections, not to mention lots of TLC and stall rest and quiet, but they do come right.
What they do NOT need is the Vet freaking out...which I have seen a few times, and trying to splint the legs, etc!!!
They need, in short, experienced care.
Given that, Nature tends to take care of the rest!!