Sorry about your Mare.
I did feed Progressive Foal First to my colt starting at 10 days up to 4 months, and he inhaled that stuff. (They were still with their mom). I was in contact with Donald Kapper from progressive nutrition and he helped me the whole way. (I had a foal that had lax tendons).
I had a foal that I was going to have to bottle feed, and and friend showed me a setup she had. (http://www.neshires.com/manny/)
“Manny wouldn’t nurse when he was born but learned to drink from a bucket. It is desirable for milk to be fed many times a day. Since we had full time jobs and prefered to sleep at night we designed an automatic milk dispenser. This dispenser is simple to put together. It is based on a small submersible aquarium pump and a timer purchased at Home Depot. Milk was automatically dispensed at 9am, noon, 3pm, 6pm, 9pm, midnight, and 3am. At 6am we cleaned the setup and fed Manny milk by hand.” They also had a webcam setup so they could watch as well.