This is good. Get him up to 101 before giving anything. Just give him an ounce and a half or so. Small feedings. If you still have colostrum, I would give him that just because there is a lot of good things in it for energy. He will no longer get any antibody protection but since he nursed from mom, he should be ok there. But the colostrum has a lot of extra stuff in it that is really good for them beyond just the antibodies.