That is Bowki. Cutie pie. :)
The one-page appearance doesn't leave much room for interpretation either way. As I said; I think people have to read what they want to into it. Dart didn't really seem that depressed in the few panels, but then he suddenly felt the need to return to wrapstuff, so he had to be sad off-screen. His decision is not sufficiently explained, and it also diminishes Bowki's importance. Again, I feel that there were better ways to make Dart (temporarily) happy again, than to give him a child. I think that his relationship with Kimo could have been emphasized more instead.
Still, I like Bowki far better than Chitter, and think that, if handled a little differently, and possibly born a while later, he could have replaced her role in Strongbow and Moonshade's lives.