We hand raised an orphaned filly from 18 days old. Bucket fed with Grober’s foal replacement milk supplement. Nice and yummy lukewarm milk…that filly just drank that up like crazy. Fairly easy to get them used to it. But the first month or so of 4 hour round the clock feedings sure took its toll…on the humans not her At 3 months we borrowed a small pony to keep her company and at 4 1/2 months she was essentially weaned and eating regular foal food. Worked for us just fine. One of the best show horses we have ever bred!
Good luck. And these foals are SOOOOO worth it!