We used to have a Pomeranian, the little kind about the size of your dogs, but we didn't take good care of her. We were always working and leaving the dog with my mother-in law. We felt bad for her because she was left alone too often so we gave her back to the lady that gave the dog to us. She had 5 othe Poms and they were all brothers and sisters so she felt more at home.
We went to the park on evening and she was there with the Dog Mother and she recognized us. It was along time since we had seen her and she was very happy to see us again.