If your husband walks the dog with an AirTag on its collar, the AirTag should be encountered by iPhones of the people whom he meets during the walk, and those iPhones will report their location when the AirTag is in their proximity.
On a school bus, the location will most likely not be updated during the route because the AirTag will be traveling alongside all the iPhones on the same bus. So, each of those iPhones will report the AirTag’s location once and then realize that the AirTag is moving along with them and will cease further location updates.
When you leave your purse in your friend’s car, you already know where you left the bag. Right? Are you complaining that you can’t track your friend’s whereabouts by planting an AirTag in her car? Because that would be stalking your fiend, and Apple specifically implemented the mechanisms that defeat stalking attempts. Also, if you have the iPhone in the same purse that you left in the back seat of your friend’s car, you (or your husband) can track your iPhone and even make it sound an alarm so that your friend would hear it, look back, and see your purse in the back seat.
As for your missing dog, I’m sorry for what happened. Unfortunately, I can’t follow your story, though. If you think that something didn’t work correctly with the AirTag tracking your dog’s location, and you want others to understand what you think didn’t work as designed, you may want to consider simplifying it (e.g. removing the details of poison ivy spraying, kids soccer practice, etc.) and putting some commas there in appropriate places, so that the story could be followed. I re-read that story multiple times trying to understand what you are attempting to say, and I can’t make any sense of it.
Apple specifically said the AirTag was not a pet tracking device. I bought a Chipolo One tag and put it on my dog’s collar, but this is just a backup plan. I take other precautions not to let my dog run away. If she does, the tag may or may not help. It’s certainly not going to hurt, and since there is no monthly fee, it’s a cheap ($30) security blanket to make me feel that in the worst case scenario, there will be a way for me to possibly identify the general area where my dog may be running.
i was very disappointed in the way the Chipolo One tag’s location wasn’t updated frequently enough during my tests until I realized that my tests were faulty. I was testing the frequency of the tag’s location by having the same phone move alongside the tag. After trial and error I realized that it was working as designed. When the tag’s location is encountered by multiple iPhones that do not move in the same pattern as the tag, the tag’s location is updated frequently.