Boo has learned, rather late in life that being nice to people is a "good thing"... And, besides, it gets you more treats :) The fascinating thing about Boo's expression here is that this "smiling" is apparently something dogs only use with humans. They don't use it with other dogs at all.

Scoring:

+ 2 😊 Best
+ 2 🙂 Good
+ 2 😐 OK
+ 3 🙁 Unsure
+ 2 ☹️ Bad

Topics:
   + Dogs looking up
   + Dogs panting
   + Dogs sticking out the tongue
   + Happy-looking dogs
   + Smiling

Download:

• Source: commons.wikimedia.org # 10804423
• Filename: Smiling Boo.jpg
• Thumbnail: 130x120 pixels - image/jpeg
• Preview: 640x589 pixels - image/jpeg
• Full size: 3225x2968 pixels - image/jpeg - 2,943,522 bytes

Licensing:

• Artist: Steve Parker from Ash Vale, UK
• License: CC BY 2.0, Creative Commons Attribution 2.0
• Attribution Required

Media information:

• Original datetime: 2009-03-21 12:54
• Upload datetime: 2010-07-04T23:02:16Z
• Uploader: User:Electron
• SHA1: a7a5b2571bdef68f050e2ac065086655d96be6a6
• Refreshed: 2018-07-29 20:11:04 UTC

Technical Topics:
   + CC-BY-2.0
   + Flickr images reviewed by FlickreviewR
   + Media with locations
   + Pages with maps