Vocal is a pet trait in The Sims 3: Pets for console and The Sims 4: Cats & Dogs.
The Sims 3: Pets (console)[]

It is available for cats and dogs, and conflicts with Quiet. It appears to be similar to Noisy.
Vocal pets have something to say and will let you know it... at length!
Attributes[]
- Pets tend to vocalize more often.
Vocal pets[]
The Sims 4: Cats & Dogs[]

It is only available to dogs, but there is a similar cat trait called Talkative. It has no conflicts.
These dogs like to howl occasionally, and can even sing on command.
Attributes[]
- Dogs bark more often, and are more likely to wake up sleeping Sims.
- Sims can "Request Song" from a vocal dog.
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