I know people who started to raise feeder pigs on the excess milk as wellThe dairy owner that I bought my processing trailer from was ready to send home all his bull calves with me as he lost his outlet this year. He was only getting $4 for them so he would have happily given me all I wanted. Unfortunately I had no idea how to raise them and for once didn't jump in head first like I normally do.
He keeps all of his heifers so all of his calves get colostrum, no matter the sex. He has to milk them 8 times before they can go back into the milk string so he lets the calves nurse.
I think I have missed my chance though as far as having excess milk. This year I am literally throwing away about 6 gallons a day; I better not be doing that next year but this is still good information to know. Just wish I had known it sooner.