Sure you do. Putting your phone number on the collar is implicit consent (request even!) to be called if the dog is found. The law is not applied by dumb machi

Sure you do. Putting your phone number on the collar is implicit consent (request even!) to be called if the dog is found. The law is not applied by dumb machines. No-one is getting fined in the scenario you mentioned, just like no-one is being fined for calling a pizza place because they found their number on a menu. Behavior can be used to infer consent.