No, the dog was more than adequate as a watch dog, as shown the next day when LE and other well-wishers and strangers began to parade through he house. The dog went frantic and jumped on each one, until it had to be removed.
Whether the noise it made was quite a "bark," exactly, it had no trouble making its concern known.
The neighbor testified that the dog was "shy and scared" and didn't jump on her.
The dog had a bark. Go to the U-T site and listen to the 911 tape. Layla is barking loudly in the background. She barked. Another lie.