I know the breeds that have docked tails, (dobes, rott, bxr...) but I don't know for what reason they do, I thought once I heard people years and years ago started docking tails of dogs so that when they were hunting, the animal the dogs were hunting didn't have anything easy to grab onto. Now... if some breeds are still doing that for that reason.... then no I don't think docking is right.
But like cloverfdx said.... with the boxer, it can cause problems and pain down the road... so then in that case yes!

As for ears... NO!! There is NO reason to put puppies through pain like that!! I've seen plenty of dobes with natural ears. It seems that only people that want there dog to look "Mean" will have there dobes ears done. Or people that think it won't look like a dobe if it's ears are not done. Well ya know what.... if more and more people didn't have there dobes ears done, then people would realize that you DON'T have to do it!!!!
Now... if there is a medical issue that I don't know about there ears, (and I'm not talking about ear infections!!) then there maybe a reason. But if it's just to make them look "mean" or because "They won't look like a dobe" then forget it!!!!