If you’ve ever been scratching a dog and seen them do the kicky leg thing, it’s truly adorable. But it might not necessarily be a feel-good thing. Hosted by: Stefan Chin SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at http://www.scishowtangents.org/ ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Chris Peters, Matt Curls, Kevin Bealer, Jeffrey Mckishen, Jacob, Christopher R Boucher, Nazara, charles george, Christoph Schwanke, Ash, Silas Emrys, KatieMarie Magnone, Eric Jensen, Adam Brainard, Piya Shedden, Alex Hackman, James Knight, GrowingViolet, Sam Lutfi, Alisa Sherbow, Jason A Saslow, Dr. Melvin Sanicas ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com/ Instagram: http://instagram.com/thescishow ---------- Sources: https://physoc.onlinelibrary.wiley.com/doi/pdf/10.1113/jphysiol.1906.sp001139 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5867383/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1540657/pdf/jphysiol02560-0045.pdf https://physoc.onlinelibrary.wiley.com/doi/pdf/10.1113/jphysiol.1906.sp001139 https://www.popsci.com/article/science/why-does-my-dog-kick-when-i-scratch-his-belly/ https://journals.physiology.org/doi/abs/10.1152/ajplegacy.1931.98.3.368 https://link.springer.com/article/10.1007/BF00606269 https://science.sciencemag.org/content/209/4462/1261.abstract https://www.allergyearskincare.com/scabies-mange.pml https://bvajournals.onlinelibrary.wiley.com/doi/abs/10.1136/vr.148.20.621 https://www.magonlinelibrary.com/doi/abs/10.1111/j.2044-3862.2007.tb00173.x?journalCode=ukvc http://www.itchnot.com/images/_9_Scabies.pdf https://bmcvetres.biomedcentral.com/articles/10.1186/s12917-017-1258-2 https://www.psychologytoday.com/us/blog/animal-emotions/201903/being-touched-is-fine-some-dogs-not-others https://animalwellnessmagazine.com/human-touch-dog/ http://www.animalplanet.com/pets/why-do-dogs-shake-their-legs/ Images: https://www.storyblocks.com/video/stock/a-dog-scratching-his-ear-edmiabkfgijtzqj3e https://www.istockphoto.com/photo/brown-dog-tick-rhipicephalus-sanguineus-on-white-fur-close-up-of-a-parasite-with-gm1216554688-354785277 https://www.storyblocks.com/video/stock/woman-petting-dog-in-slow-motion-4gxedx6 storyblocks.com/video/stock/girl-scratches-a-small-dog-on-the-grass-a-girl-is-sitting-on-the-grass-and-playing-with-a-small-dog-bbek90kwuzj6e4r37 https://www.storyblocks.com/video/stock/doctor-the-neurologist-examines-the-patient-taps-with-a-hammer-on-the-knee-close-up-s7xjpl-vizjdbimia4 https://www.istockphoto.com/photo/this-sure-feels-good-gm1271641116-374162601 https://commons.wikimedia.org/wiki/File:Scratch_reflex_demonstrated_by_Irish_Wolfhound_mix.webm