Technically one syllable:
* Pug: Pronounced with a single syllable, "pug."
Two Syllables but can be shortened to one:
* Yorkie: Shortened version of "Yorkshire Terrier."
* Poodle: Can be shortened to "Poo" in informal contexts.
* Lab: Shortened version of "Labrador Retriever."
One Syllable if you use a slang term:
* Beagle: Can be referred to as "Beag" in informal speech.
* Bulldog: Can be shortened to "Bull" in informal speech.
Let me know if you're looking for specific characteristics within these breeds!