A dog will not recognize two owners in the house. Generally speaking, dogs are only willing to recognize one owner in their lifetime, and will not recognize two owners at the same time. But if the dog is abandoned by the original owner and adopted again, after meeting a new owner who is kind to it, it may recognize the owner again. When a dog recognizes its owner, the dog will obey the owner's instructions, like to stick to the owner, and will be reluctant to leave the owner when he goes out.

Signs of a dog recognizing its owner:

1. The dog will often stick to its owner, and the dog will surround him wherever the owner goes.

2. The dog will respond to the instructions given by the owner to a certain extent. For example, if the owner calls it, the dog will naturally run to the owner.

3. Dogs will protect their owners. If a dog sees other dogs approaching its owner, or other people bullying its owner, it will be aggressive to other dogs or people.