No, I wouldn't really call this personification. While barking is generally used to refer to the sound dogs make, barking can also be a way of speaking. It means someone is talking in short sentences and usually loudly. Most often you will see this used when someone is giving commands or orders (like in the example you give). You might imagine a doctor in the emergency room giving commands to people like this: "Give me a needle! I need the medicine! Get out of the way!" That would be someone barking out orders.

Thank you! But right now I am also an English learner~~

Oi Rachel, tudo bem? Let's go to practice portuguese and english?

Oi, meu nome é Marcelo, Do you want to learn portuguese? I want learn english, so...add me on skype and let´s learn!!! my skype is marcelomirmar68 bye