Just got an e-mail from a dog mailing list about walking dogs on collars. The original e-mailer said that it should never be done because it promotes neck injuries, collarbone injuries and even glaucoma. They said that dogs should be walked only with a harness and never with just a collar unless the dog is trained to never, ever pull. Other people seemed to agree. One even said that their dog never, ever, wears a collar for any reason because of this. I've never used a harness on a dog. To me a collar seemed perfectly fine and convenient. The dog wears it 24/7 and you just snap a leash on when you're ready to walk somewhere. To me a harness is just a big hassle (although I believe it's a must for smaller, toy breeds who have brittle necks). It's a pain to maneuver the dog into it before the walk and out of it after the walk when I can just snap the leash on the dogs neck and head out the door. Am I just being lazy and doing my dog a disservice by walking them with a collar? Or am I freaking out at the idea of possibly causing blindness in my dog?