The past couple of weeks, I've noticed that my 8-month old lab/hound/?? mix puppy has been showing her front teeth when she greets us. She's not growling or upset. Quite the opposite--she's wiggling all over, the tail is wagging like crazy, and she seems pretty happy. It happens only when I get up in the morning or when I've been out of the house. Of course, I'm talking and smiling at her when this happens.
I've never seen a dog do this before and I have to admit, it's just a little scary. Probably because she's a black and dark brown brindle and seeing those white front teeth is a little disconcerting. She does it to me all the time, my husband a couple of times, and my grown son has seen it once.
I know it seems like a strange question, but could she possibly be trying to smile in response to our greeting? Or is this something I need to be concerned about?