In my experience, docking of tails and removal of dew claws is done before the puppy is 5 days old. The ears wait until the dog is a bit older and have more cartilege so that they will "stand" better. You wouldn't believe the number of times that I've seen some dogs (dobies or schnauzers mostly) come in because their ears weren't standing properly. We kept a supply of little plastic crown-looking things that the ears were glued then taped to so that they would be forced to stand - until the dog got the thing off. Another dr would use a tampon and tape it to the ear.
I have seen dewclaws removed on older dogs and it is considered major surgery. When they are young pups the bone isn't really hardened and they can be just clipped off. When they are older it is like having a finger amputated. You just have to be careful to make sure that the nail on the dewclaw is kept trimmed, otherwise there is a risk of it growing into the pad then you are looking at surgery to fix that.
One of the most awful things in the world is the ear docking. I never assisted on a surgery on that but did have to help clean up. The ears are very vascular so it is a messy surgery. And when the poor dogs wake up they are screaming in pain, shaking their heads wondering what has happened.
I think that the policy on pain medication for dogs after surgery has changed since then, but when I was working they were never given anything to give them any relief. It was always heartbreaking.
Tail docking on puppies is just a snip and a couple of sutures. On an older dog it is major surgery. And you can tell that the older dog knows that something is missing when its tail is gone.
And we won't get into people who have pitbulls and have the ears docked as short as possible along with the tail. These were dogs that we knew were headed to the "ring" for a fight.
Wallis's breeder usually did the dewclaws on her pups but Wallis's litter got missed somehow. I think Sasha and Tibby both have theirs.
And an interesting note, Great Pyrenese have double dewclaws. Strange looking - kind of like a 6-toed cat!
RIP Wallis, John Robert, Tibby & Pip
Mom to JoJo, Roxie & Linguini (Cavaliers)
and my birds Moji (Senegal) and Walter (Blue Front Amazon)