I just renewed my dog's license for 2013 two days ago online, and got the new tag in the mail today.
1) wait until 2013 begins to put it on her collar (and hope I don't misplace it)
2) put it on her collar now along with the 2012 tag, or
3) put the 2013 tag on her collar now and dispose of the 2012 tag?
What would you do, AMA?