A ranger cast beast sense on a war hound mount/beast companion and sent the poor guy through a hell gate. I immediately told him that he no longer perceived the world from the hound's perspective because it was now on a different plane. However, he pointed out that the spell said nothing about any range limits, which is true. I ruled that since not even a warlock's special familiar (pact of the chain) using the incantation voice of the chain master could bypass planar boundaries, his 2nd level ranger spell also couldn't.
What are the limitations of beast sense and similar divination spells regarding planar boundaries?