my dogs where collars with no ID tags. they dont where the collars for Id they wear the collars so they can be held easy, only perky and Ripley wears tags, no idea why Perky does, she does not exactly run away, th elast time she got out of the yard she sat at the gate and waited for someone to notice lol taking her to the park is pointless as she just stands beside you as if she were leashed Ripley where tags and is tatooed because he is an escape artist. Happy and Misty dont go anywhere either, they hate it if anyone tries to make them leave my side lol Blair need tags..does not have any, he only wears a collar to make him easier to grab, we just through whatever collar on, he does not have a collar that is specifically his.