Kador

Kador is a dog who travels with Zoltan the gypsy.

Description
Kador was a shaggy, amicable dog who entertained the Avatar with a number of tricks. The dog carried a bowl to collect coins, and was quite pleased if the Avatar donated for its effort. If the Avatar refused to pay for Kador's performance, the other gypsies of Zoltan's band would refuse to speak to the hero.

If the Avatar asked the dog for "advice," or simply to "speak," it replied by saying, "I feel that the whole debate over 'free will' versus 'determinism' arises from an artificial semantic division. In light of the works of Godel and Heisenberg, it is evident that the two concepts are indistinguishable and thus, for all practical purposes, identical."

After speaking once, if the Avatar asked the same keyword again, Kador would only respond with a bark.

Runes of Virtue
Kador would again demonstrate his sharp canine intellect in Runes of Virtue, where he offered the hero significant clues in solving the puzzles within the dungeons of Britannia.

The Ultima 6 Project
In The Ultima 6 Project, Kador would further warn the hero to avoid Arturos and his band of gypsies.

Trivia

 * In the C64 Version of Ultima VI is Kador in appearance a  Wolf, but in the dialog still a  dog.