The tail in dogs is fairly important for communication (especially with other dogs - intraspecific communication), as it can indicate many different emotional s

The tail in dogs is fairly important for communication (especially with other dogs - intraspecific communication), as it can indicate many different emotional states, not only excitement. See for example https://www.mdpi.com/2076-2615/8/8/131/pdf https://www.mdpi.com/2076-2615/8/8/131/pdf https://www.dogways.info/how-dogs-communicate https://www.dogways.info/how-dogs-communicate and https://www.psychologytoday.com/us/blog/canine-corner/201112/what-wagging-dog-tail-really-means-new-scientific-data https://www.psychologytoday.com/us/blog/canine-corner/201112... This is another reason why cutting the tail is wrong - besides the fact that it's cruel (it's almost incredible now, but it was common a few years ago, and it is still practiced in some countries).