I have a dog.
Oh a domestic dog member of the canis familaris
Yes, my dog is my best friend.
, aiding disabled people and therapeutic roles. This influence on human society has given them the sobriquet of "man's best friend".
Terminology.
- The term "dog" typically is applied both to the species (or subspecies) as a whole, and any adult male member of the same.
- An adult female is a "bitch".
- An adult male capable of reproduction is a "stud".
- An adult female capable of reproduction is a "brood bitch",
for both a hypernym and its hyponym. For example, the word "dog" describes both Canis familiaris and male Canis familaris, so it is possible to say "That dog isn't a dog, it's a bitch" ("That hypernym Z isn't a hyponym Z, it's a hyponym Y"). Similarly, the verb to drink (a beverage) is a hypernym for to drink (an alcoholic beverage). Autohyponymy is also called "vertical polysemy". 
The term "autohyponym"