So while I was taking pictures of Tucker waiting for his mama to finish laying down his cheese trail, I got a closeup of his collar, prominently featuring his Boomerang tag. Specifically, this is the Boomerang CollarTag, which is a sturdy stainless steel plate engraved with up to four or five lines of text, depending on the size of the tag. They slip on to the collar and then pretty much stay put; they don’t jingle, they don’t hang from a little metal loop, and as far as I can tell they never wear out. (This one is about six years old.)
Of course, if the dog loses his collar he loses his tag, but other than that these tags aren’t going anywhere. In fact they’re pretty difficult to get off even when you’re trying to remove them.
Unconfirmed reports suggest that these tags can also stop bullets*, signal aircraft**, grant the power of flight***, disarm atomic weapons****, and, if you have enough of them, be connected together to form plate mail*****.
The “My Mommy Misses Me” line is there because my wife knows someone whose dog was lost and, when it was eventually returned, the person who returned it said that they were going to keep the dog (despite the fact that it had tags) until they saw that its collar said “My Mommy Misses Me”, which made them feel guilty. Ever since then, this line has appeared on all our dog tags. (Trixie being “my” dog, my wife suggested that her tag could say “My Daddy Misses Me”, but we ultimately decided that “Mommy” would produce a better guilt trip.)