They can interpret the bark as well as they could any dog's - which is to say, they get the first part, a sense of disappointment at non-engagement, but not the second.

That's well communicated by the subsequent actions. Chara takes the opportunity to increase the gap, a smile spreading up their face. Well, two can play at that game. They jerk their head back, flashing their throat, motion with their weapons towards themself, and let their steps backwards occur in more of a confident straight line. A fluffing of fur in all but the actual.

They huff in their throat and through their teeth; a more aspirated tch.

What about you, dog monster? You haven't closed the gap yet.