so they want to warn their enemy or they want to be safe
No, It's very normal, although I do not know why they do it.
Yes it's very common especially in light sleep as you are still drifting into deep sleep (REM sleep), and are still physically aware of where you are. You begin dreaming as soon as you start drifting off to sleep and if anything happens to make you jump in your dream, your body will respond to it as if it were real, making you flinch. Eventually when you fall into deep sleep you don't normally flinch or jump up during dreams.
It is not good for a dog to seizure, foam in the mouth, and flinch from human touch. It may mean that the dog has rabies. It means you may have to shoot the dog.
The dog is uncomfortable around humans still, maybe. Most dogs are like that.
Flinch
Babies flinch in their sleep due to the Moro reflex, also known as the startle reflex. This reflex is an involuntary response to a sudden noise or movement, causing the baby to fling their arms out and then bring them back in. It is believed to be a primitive survival instinct that helps protect the baby from potential dangers.
According to IPA, the phonetic spelling of flinch is /flɪntʃ/ In spelled pronunciation, the word is pronounced /flinch/.
My dog has a doghouse that she will sleep in but it used to belong to our other dog.
Every time I watch a 3D movie, I flinch.
Learning to Flinch was created on 1992-06-24.
The inside fastball caused the batter to flinch.
No, if it is cold (or any temperature) the dog should not sleep wet. I will get sick... ARE YOU TRYING TO KILL YOUR DOG??!!