We have a pug - used to have a lab/saint bernard mix also. Both bark/growl in their sleep. Sometimes the lab would 'run'. Both wag their tails. It's really noticeable on the pug, as her tail relaxes until she wags it - then it curls again.
I'll try to add a picture... Hope they come through okay.
Teddy we had put down this past summer, as he was old, and having several health problems. It is so hard to lose a pet like him. He was truly a member of the family, and had protected my girls through so many things for a lot of years.
Tiny
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Teddy - on my daughter's sleeping bag - thought it was his!
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