Scientists have found the same cell types that cause goosebumps are also important for regulating stem cells that regenerate the hair follicle and hair.
In this study, we identified an interesting dual-component niche that not only regulates the stem cells under steady state, but also modulates stem cell behaviors according to temperature changes outside.” – Ya-Chieh Hsu
Source: The Harvard Gazette, July 20, 2020. Link.
Commentary
The new findings connecting goosebumps to stem cells sparked added investigation to clarify what I recalled as an adrenal response.
Source: Why do humans get “goosebumps,” Scientific American, September 1, 2003. Link.
This reference explains the human phenomenon as a physiological phenomenon inherited from our animal ancestors, which was useful to them but are not of much help to us.
But what about dogs and cats?
Source: Piloerection: What does raised hackles mean? The Bark, September 2019. Link.
Karen B. London PhD explains the hair raising as an involuntary reaction usually signifying the dog is aroused, fearful, startled, stimulated or excited in some way
Source: All about piloerection: not a dirty word, we swear, Petful, April 17, 2012. Link.
When you notice piloerection in an animal you don’t know, never assume it is a safe situation. This may be the only warning you get from an animal that they are not in a relaxed state or are aggressive.
INSIGHTS: Biochemical? Neurological? Cellular? Hormonal? I would answer yes to all, at least until additional research digs deeper. But then, we’ll still back down from a dog or cat with raised hackles, right?! 😉