With Dutch, it's hit or miss with the mirror. Some days she can see herself in the mirror and not be phased at the other "yorkie" in the mirror. Other days like this morning, she totally freaks out.
This morning she had me laughing so hard. She saw this other yorkie in the mirror and started growling and barking. Then she sat and stared at it to make sure it wouldn't come any closer. It worked because that other yorkie didn't come any close
Gotta love em