From when? Lots of information and links on breeding and whelping basics in the first link below. Whenever you meant your answer is there along with a lot of other important things you would need to know. Second link is the Border Collie breed parent club. Good Luck.
q3525724.html#a2810229
http://www.bordercolliesociety.com/
q3525724.html#a2810229
http://www.bordercolliesociety.com/