Was talking to 2 friends separately yesterday, and the subject of castrating weanlings was talked about. One of them closes the Burdizzo on the string, opens it more or less straight away, and moves down the string 1/2 an inch and closes it again. To be sure to be sure. The other man does it the same way but only the one closure on each string, but gives each a shot of Pen-strep to each beast as well. Meanwhile here I have done it the way my father taught me - close it on string, leave for at least minute on each string, open, and repeat on other side. He always called what 1st man does as "chopping", and reckoned it was dangerous. And he reckoned that the leaving for the minute was the real right way. Also I have another friend who swears by putting lambs rubber rings on new born calves. What way do any of the rest of you do it, or your opinions?