Keeping someone else's dog may not necessarily recognize the owner. The specific judgment depends on the dog's character, age, and how carefully the previous owner and the new owner take care of the dog. If the dog is a puppy, it will be easier for him to recognize his owner again. If the dog is an adult, but the previous owner has hurt the dog, and the new owner loves the dog more, the dog will recognize the new owner, otherwise the dog will only be loyal to the previous owner.

How do dogs recognize their owners?

1. Dogs’ sense of smell is very sensitive. Dogs usually identify whether they are their owners through smell, so You will often find that your dog will sniff you and lick you. This is recognizing and getting familiar with your scent, and it is also scent marking you.

2. The dog has become familiar with the owner’s scent and needs to rely on its memory to remember it. The longer you spend with your dog, the more familiar it becomes to you. Even if you haven't seen it for a long time, it can still remember its owner. Some dogs are lost and can find their homes with the help of their memory.

3. Dogs’ hearing is also very powerful. Studies have found that dogs’ hearing frequency can reach 1 million Hz and can recognize very small sounds. Dogs can recognize your footsteps through the frequency, sound, etc. of your walking.

4. Dogs have poor eyesight and cannot see rich colors like humans, but dogs’ dynamic vision is much better than humans. Dogs can identify who is the owner by observing the external shape and movement route of the human body. This is why the dog can catch the ball given by the owner.