My new pup sleeps all day, and sometimes when she sleeps she starts this shaking type episode. It really freaked me out so i went to wake her up and she slightly opened her eyes and they were rolled into the back of her head so i could only see the whites and she didnt stop shaking right away. I know doggies dream too but this freaked me out! My other dog who lives with my mom has puppy dreams and she cries in her sleep. But i have never seen this before! Does anyone elses chi's do this? I'm scared... i took her to the vet and she was perfectly healthy. are these just dreams?