There is a distinctive and easily recognized open-mouth expression that is the canine equivalent of a human smile, illustrated here.

Sometimes, when a dog’s mouth is open – and they’re perhaps panting too – it looks as though they’re smiling. However, a ‘smile’ from a dog doesn’t always indicate that they’re ...

Some signs that your pet may need a dental checkup sooner include bad breath, broken or discolored teeth, abnormal chewing or drooling, reduced appetite, pain around the mouth, and irritability. Pets ...

Would this show up as a facial signal, like the smile of a human? It's Not Easy for a Dog to Smile The first thing to note is that there is a limitation on the range of facial expressions produced ...