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.
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.
Time of day is addressed in the study and
was not a reliable predictor of expression of alignment
They also mention that the presence of the sun is possibly likely to affect dogs less than humans - meaning that dogs might have less aversion to facing the sun.
Study is here: …biomedcentral.com/…/1742-9994-10-80
Introduction Several mammalian species spontaneously align their body axis with respect to the Earth’s magnetic field (MF) lines in diverse behavioral contexts. Magnetic alignment is a suitable paradigm to scan for the occurrence of magnetosensitivity across animal taxa with the heuristic potential to contribute to the understanding of the mechanism of magnetoreception and identify further functions of magnetosensation apart from navigation. With this in mind we searched for signs of magnetic alignment in dogs. We measured the direction of the body axis in 70 dogs of 37 breeds during defecation (1,893 observations) and urination (5,582 observations) over a two-year period. After complete sampling, we sorted the data according to the geomagnetic conditions prevailing during the respective sampling periods. Relative declination and intensity changes of the MF during the respective dog walks were calculated from daily magnetograms. Directional preferences of dogs under different MF conditions were analyzed and tested by means of circular statistics. Results Dogs preferred to excrete with the body being aligned along the North–South axis under calm MF conditions. This directional behavior was abolished under unstable MF. The best predictor of the behavioral switch was the rate of change in declination, i.e., polar orientation of the MF. Conclusions It is for the first time that (a) magnetic sensitivity was proved in dogs, (b) a measurable, predictable behavioral reaction upon natural MF fluctuations could be unambiguously proven in a mammal, and (c) high sensitivity to small changes in polarity, rather than in intensity, of MF was identified as biologically meaningful. Our findings open new horizons in magnetoreception research. Since the MF is calm in only about 20% of the daylight period, our findings might provide an explanation why many magnetoreception experiments were hardly replicable and why directional values of records in diverse observations are frequently compromised by scatter.
So when you’re lost, just find a pooping dog to know where the North is. Or the south.
Wait this is useless.
My 5 year old dog spins when she poos. Picking up her poo requires me to check the area she was in, as there are usually 3-4 spots it landed. But unleashed, she’s fine.The vet tells me this might be harness related. Something about the restraining leash and harness makes her spin.
But now I have a morbid curiosity to see if she starts north or south.
The article itself is over a decade old and based on questionable data gathering and a faulty analysis processes. If you read the article they published they essentially didn’t find anything, determined without providing evidence that other factors couldn’t be a determining factor, and then data-dredging when they could find anything statistically significant to match their hypothesis.
SkeptVet article explaining the findings in detail.
Basically it was just shitty science.