Hundreds of animals are brought to veterinary practices every year, by the RSPCA, the Police and members of the public. Some are completely healthy! Others are sick or injured. Pets without ID are stray. Strays animals, where possible are rehomed, or alternative difficult decisions have to be made based on age, injury, and health.
We recommend identification, so that you can be contacted if your pet is found and it ensures valuable treatment choices can be made. In fact, you may not be aware, it is a legal requirement to have a collar and tag on a dog.