Generally, barring angular deformities or storms I turn babies out with momma in an paddock by themselves right away. In a FW days they go on pasture with other mares. I have a foal blanket so they can even go out if it’s pretty cold. They also get a three sided shed.
When they go on pasture they have big run ins, trees, and I bring horses in for rain or snow. For chilly weather they can wear their blanket until their little foal bodies get some fat on them. I’ve never had to do that past one week but never keep them out in temps less than 25 degrees.
