I'm not saying it isn't the general case. I'm saying it isn't absolute. I also am not saying sleepwalking is part of REM; I'm saying it is an example of how mechanisms for quiescence are not perfect.
And since we're talking specifically about your claim about dogs, I'd like the dog reference specifically, please.
I did Google and found a source contradicting your claim, as well as nothing supporting it.
As I've explained, I bring those up as examples that the sleep system is not 100% reliable, so I think it's a mistake to go from the general case of "most motor control is shut down during REM sleep" to "nobody in any species ever twitches during a dream".
Given the ad hominems and the repeated misunderstanding of what seemed like a simple request to me, I don't see a lot of value in trying to explain my question to you yet again.
I know someone who sleepwalks their dreams. People are demanding sources because you are claiming "always" when the reality is almost certainly just "usually."
I'm talking about general cases, not disorders. Sleeping walking doesnt occur durring rem, Google it. there's other disorders that allow for movement durring rem. What does disorders have to do with anything?
https://www.sciencedaily.com/releases/2012/07/120711131030.h...
sleepwalking isn't related to rem stage, most movement doesn't occur during rem stages
https://www.mayoclinic.org/diseases-conditions/sleepwalking/....
https://www.uofmhealth.org/health-library/hw48331
I don't think its farfetched to guess this applies to other mammals