I surely don't approve of piercing your animals, how bizarre, but then I don't approve of young babies and children having them either, and yes we have done that thread before, but to me it is just the same.

If you tattoo the animal for identification purposes or cats get their ears done to prevent cancer (white cats especially) then as long as it is done properly and humanely I am ok with it.

The only reason a dog owner would do it, is because they like the look of it and consider it cool, not a good reason IMO.