all of my dogs wear collars but only 3 of them have ID tags...maggie and eli have ID tags and keesha has a tag that says if you find me to go www.getmehome.com and it has a number you put in the website and it will give you her/my info...the other 4 dont have tags because i just never got them any...i do need to get around to doing that though....all of the dogs use to have ID tags but they fell off or broke so i need to find some good strong sturdy ones