No matter how long it has been since the dog saw its owner, the dog will never forget it. The dog will remember the owner all his life. Even if it is several years, the dog may not react at first, but when the dog comes over, he smells the familiar smell and hears the familiar sound. If you hear the voice, you will immediately recognize the owner. Dogs are very loyal animals. Before getting a dog, you should consider whether you can take care of it for a lifetime. Do not abandon the dog casually, as the dog will be very sad.