Where can I read about this? It seems easier to verify than the claims in the OP.
ETA:
I looked at google images for “dog body language.” I see some people saying that showing the belly is happy, while others said it was submission (and one saying both!). This seems like a good example of what you are saying, but are there more? Added: nose lick as stressed vs peace, although maybe that isn’t even a confusion, but just opening the box of what it means to sue for peace.
Where can I read about this? It seems easier to verify than the claims in the OP.
ETA:
I looked at google images for “dog body language.” I see some people saying that showing the belly is happy, while others said it was submission (and one saying both!). This seems like a good example of what you are saying, but are there more? Added: nose lick as stressed vs peace, although maybe that isn’t even a confusion, but just opening the box of what it means to sue for peace.
https://en.wikipedia.org/wiki/Dog_behavior I’d guess textbooks would be the best place to find research.