I have a one year old female Staffy, Millie, who is a rescue dog. When I pet her, the corners of her mouth turn up, as if she is smiling. She doesn't show her teeth or open her mouth, it's just like a human smile with the corners of the mouth. More like this; than this;
You can see by the shape of her eyes at the time that she is happy, so is this a smile, or just a natural facial shape? When we first got her she was very timid, but she 'smiled' when we showed her love, something she hadn't been shown much of before.
I searched the internet to try and find out but everything I could find was relating to the dog opening the mouth and panting with a smile-like expression.
Anyone know?

I am sure they do lol ours sort of scrunch up thier nose a little so their eye shut a little and one side of the mouth goes up, will try to catch a pic of them doing it, and they do it in time of me saying wheres my darlings or some such endearment, so I know it is a response to me lol.

Mo

Aaaw bless her

My sister had a foster Dalmatian who use to smile, it was quite endearing!
Though to the un familiar.......it could make you feel a little uneasy lol

Yes they defo do! My sisters Chi smiles on demand and with the big dogs if we laugh or dance (they love to dance lol) the ears flap back and they do a definate smile. We always say our dogs have a great sense of humour lol

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Yes they can, my tibetan terrier smiles on command, i say cheese and a huge grin comes across her face!!!! it makes her sneeze sometimes tho! It very cute! x

Yep Dave grins at me when I get up in the morning or when I get back from shopping

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Yes they can! My greyhound used to bear her teeth when she was wagging and happy, a big cheesy grin. I realy miss her cheeky smile.

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Photography

Yes they can smile my springer dose it all the time.

I know what you mean. They dont show their teetch, but the corners of the mouth turn up so it looks like a smile.

Both of my SBT's do this. One more than the other.

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Knacker Lacquer - Adds Luster To Your Cluster

Yes Buster does it when he's in the car or just really happy and the Samoyed we had here never stopped smiling of course. SBT's are infamous for their smile.