A dog is barking loudly.

一只狗在大声地吠叫。

youdao

Yaoyao: Oh, listen, a dog is barking.

哦，听，一条狗在叫。

youdao

The dog is barking loud and chasing a cat.

这只狗狗大叫着追赶一只猫。

youdao

Dr. Oguss says sometimes a well-mannered mutt is egged into barking by another dog.

WSJ: Hawaii Turns to Dog Shrink as 'Incessant Barkers' Cut Plea Deals

When a bark is detected, the lowest level of correction is given, and corrections will rise until the dog stops nuisance barking.

ENGADGET: Garmin announces new dog collars, talks up 'Bark Odometer'