bobtail
bob-tail
noun
A short, docked, or naturally stunted tail, especially of an animal.
"The sheepdog's distinctive bobtail wagged happily."
verb
To shorten or dock an animal's tail, often for practical reasons.
"Farmers used to bobtail their horses for safety."
Thesaurus
Synonyms: bob, dock, Old English sheepdog, bobtailed, caudate, caudated