You want to be sure your pet won’t chew/eat it. I use a case that slides on to a tag collar like a belt loop. Like these: https://www.amazon.com/gp/product/B0B

You want to be sure your pet won’t chew/eat it. I use a case that slides on to a tag collar like a belt loop. Like these: https://www.amazon.com/gp/product/B0BGQGZLP6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1 https://www.amazon.com/gp/product/B0BGQGZLP6/ref=ppx_yo_dt_b... Also, while air tags will help in some situations, they are useless in many others. I use them because I don’t think it will hurt, but I wouldn’t count on them. (I also have a Fi collar for my risky hound, which is a GPS collar. GPS collars also don’t always work.)