From what I was told about banding is basically what Carina said but if done to early can be a health risk ot the pup and personally I think it is cruel. I am not a big fan of docking or cropping but with certain breeds it is better for them healthwise.
A dog has so many friends because they wag their tails not their tongues.
R.I.P. Buddy 2002-2008 The best Mastiff ever.
Now owned by Clark the Crazy American Bulldog