>> So what should we feed such a tiny snake?? Thanks!
Most milksnake hatchlings can eat a NEWBORN mouse pinky...there can be a dramatic difference in size between the average pinky sold at a petstore and a newborn. So you might need to ask that you be called when the next litter is born, for example, and pick the smallest one. Or you COULD try a small lizard, but i'd suggest you freeze it first for a week and then thaw it, to reduce the chances of teh snake getting parasites from it.
Milksnake babies can be hard to start, depending on the subspecies. It would be useful if you told us what state you live in, and the nearest big city. Then someone on this forum will know specifically what kind of milksnake you've found, and might be able to give better advice on feeding it.
good luck!
terry