Having done tail docking as an RVT for many years, I can tell you the pups react very little to the snip. They protest much more loudly to being stepped on or nipped by their littermates. The dewclaw removal is more painful but quicker now that they use Vetbond tissue glue rather than a suture. I always found it kind of strange though, looking at those 8-10 tails lined up afterwards on a paper towel!!