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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 scenarios 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)
The text in the picture literally explains it's in a free roaming environment not influenced by walls or doors.
Walls and doors don't stop existing when you walk outside lol, big buildings exist
And "clouds"
Yes, that should be fine - water is the real danger here.
Dogs still poop when they're inside
Presumably, they'd do the same thing at night.
But in that case, we'd need to be sure that they aren't using the North Star.
Dogs can poop at night...