The Smart Dog Tag
All the things you need to do is attach DOTT to your pet's collar and pair it with your mobile app in order to convert the phone into a virtual leash.
DOTT sends a signal up to 350 ft radius
Source
The virtual leash works as alarming you that your pet is stray away from you so you need to take care of it.
You can take help from social media community. Thye help you in finding your pet.
https://www.kickstarter.com/projects/1330747024/dott-the-smart-dog-tag
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