Dog compass?

Maybe! From Phys.Org, "Magnetoreception molecule found in the eyes of dogs and primates."

I think (and I believe the article states this as well) that the ability to orient oneself to the Earth's magnetic field has long been understood to exist in birds, but it's interesting that it may exist in the same way in other species.

Source: http://phys.org/news/2016-02-magnetorecept...