Buying a pet identification tag for your Appenzeller Sennenhund is like purchasing an insurance policy – you do it with the devout wish that you’re never going to use it. The “possible cost” of not having a pet ID tag is more expensive than the “real price” of buying the pet tag itself.
The type of pet ID tag that you buy is important, so take five minutes or so to consider it. Whimsically picking a collar tag because it’s cheap or cute usually ends up being unwise, long-term.