Hey now, be nice about babies and their earrings. This was about dogs remember? I have 2 of my girls' ears pierced and the 3rd will have hers done soon. My 3 year old BEGGED me, litterally cried at the store to get them done because she wanted them so bad. I had my oldest daughters done as a baby. After going through it with a baby and with a 3 year old, I would opt for doing it as a baby anyday. Immunizations hurt WAY more than the earrings do for a baby (its very obvious). And just like with immunizations, its worse when a child is anticipating it. They are better off not knowing its coming lol. Some cultures pierce thier babies ears at birth. Much better than chopping a tail and a finger off when they are a few days old IMO.
That being said

I wouldnt give my dog an earring only because it would probably end up getting ripped out all the time by one of my other dogs while they are playing. I dont think its inhumane (people tag and brand their cows, even the friendly ones, tattoo and microchip their pets

) I just wouldnt want to do it personally.
Some people think dressing a dog is mean and sick. Dogs werent made to wear clothes, but we do that.