do?

this notebook  stayed blank
for a second
but then i hear a loud bark
my dog ran out from the room
and barked 3 times
the started wagging her tail
the i got her attention and she
rested her head on my knee
i caressed her head for about
20 minutes
telling her to stop barking
i pointed towards the room an she
went back into it
then it was quiet again
this notebook is no longer blank
do dogs have nightmares too???