Daggit
From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide
A daggit is a canine-like animal used as a domesticated pet, watch animal, or tracker. No daggits survive the Cylon holocaust.
Boxey loses his daggit, Muffit, to the destruction on Caprica.
A robotic counterpart similar in appearance to a daggit, named Muffit II is built by Dr. Wilker and presented to Boxey (Saga of a Star World).
Like a real daggit, the new Muffit proves its bravery and dedication to protecting humans during a dangerous fire aboard Galactica (Fire in Space).
Additional mechanical daggits are briefly seen in the pilot episode of Galactica 1980.