I have my dog's dew claws removed when they are neutered. It's just a stitch or two, bandages for a week or so. They can be removed without anesthetic up to three days after being born, as they are still cartilage and have not hardened yet. After that they need to be put under.
I have chain link fence all around my yard, it is a dew claw hazard. I'd rather have them removed under ideal circumstances rather than an emergency situation.