this morning alone i have seen four dogs out on the field having a walk and not one of them had a collar on if they were to wander off or get chased by another dog and get lost and were found where would you start looking micro chips are good both my dog and cat are chipped but having a disc and a mobile any owner would be able to let the owners know that the dog is safe and the law is any dog in a public place must wear one dog owners don’t carry a scanner to read a chip and if you were taken ill out with your dog it has your address on it and name so do your dog favor and get him or her a disc