The only collar that has tags on it is Lars' therapy dog one...that has his Therapy dog tag on it and a name tag. The boys are microchipped but their collars don't have tags on them. I'm always rotating collars on them and in agility, collars shouldn't have tags on them for safety reasons anyway. The only time they wear collars are when they are off the property. Most of the time they are off the property, they are a) confined to crates in the car, b) at training, c) at a show, d) at the beach where for the most part they are on flexis while swimming. I can't keep tags on their collars for some reason, Lars has lost more tags than I can count. Ocean had a cool one on his collar and it lasted 2 weeks and it vanished without a trace. I gave up with tags a couple of years ago.