Be very careful with turnout. We have helped with several. We used to get all of the re-habs from a Vet clinic that did not want to bother with them.
We found they straightened up best with stall rest and did not splint them. We had some start out so bad they needed help getting up and needed help standing for the first few day.
They were much better and could follow their mamas in a few weeks at most -- some in a few days if they weren't that bad.
I have seen some pretty bad scars from splints that rubbed a foal's legs.