A viewer sent me a video of a dog that sleeps in a Faraday cage and only leaves to eat and eliminate, but then returns to spend it’s time there. Is it sensing dangerous electromagnetic frequencies or other energies which are blocked by this “safe haven?”

Interestingly, this is indeed the case. This is an animal particularly sensitive to electromagnetic frequency perturbations. That is an intuitive sensing, not a sensory one through the common physiology of the dog's body. Dogs are more intuitive than humans by far, because they have not been corrupted as humans were by the extraterrestrials long, long, ago, to dim the intuitive reach.