This is Lollie, she is the sweetest dog in the world, unless you are Vinnie or someone who she thinks is threatening me, then she turns into a snarling, growling vicious machine. She has no teeth so she can do no harm, LOL!
A lot of people think she's ugly because she's missing all her teeth and a lot of times her tongue is hanging out. Well, she's NOT! :)
1) The subject is tough. In reality it's excellent and of course you think this dog is the most beautiful thing in the world where others might see an old decrepid dog. Perfect application of the saying, BUT in our weird world, people still want to see pictures of appealing things. You probably lost a bit for having the guts to take a picture which may not have mass appeal. (That's not a bad thing! It just doesn't help your score.)
2) The focus does seem just a bit soft. I'm not sure if it is DOF, OOF, or motion blur (even though you were at 1/250th). You can see this most apparent in the fur at the top of his head.
3) Perhaps to compensate for the focus, it seems a bit oversharp. If not, it may be just a bit too contrasty (which I rarely say in 4.7-5.3 pictures).
4) The square crop isn't the best. I would have actually made it more vertical so you had some negative space to move the dog slightly off center.
5) The conversion to B&W is pretty good. I think you did a good job there.
Poor little gummy-mouth... :-) Does she drink all her food?
While the head is pretty centered, the one ear being away form her head helps the composition be more dynamic. Pretty good shadow detail.