doggos - Mander

Studies like this have me confused.

How do we know they use the magnetic field, and don’t just like… Look at the sun, or the shadows it casts.

You can put magnets near dogs.
There’s also this thing called “indoors”
I dont think there are many situations where a dog frequently shits inside a human dwelling. It is a valid point though, perhaps they tested that too (dogshit smells in an enclosed space, gotta envy those researchers)