I was just listening to your discussion about AirTags.
Apple said not to put an AirTag on pets.
I’ve had one on my dog since they came out and it has come to the rescue several times.
I picked up a silicon holder for it from Amazon for USD5 and that attaches easily to the dog’s collar (link).
It doesn’t bother him. He goes in the surf every day with it.
And, when he goes off the reservation, he gets caught.