Yawning
What it is
A yawn outside a sleepy bedtime context.
What it can mean
It can be a calming signal or a sign of tension, not just tiredness.
What to do
Pause, soften your voice and give the dog a way out.
Source: Mariti et al., 2012; Rugaas, 1997
An AI read, not a diagnosis. If you are worried about your dog, see your vet.