Great job with tough models :) I'd like this picture more if it were sharper and maybe if the dogs stood apart from the background better. A shallower depth of field or maybe just a levels adjustment could accomplish this.
Hard to tell, but I think the lighting might have been flat on the day you were shooting. The image has been given adequate contrast overall, but the whites have mostly been soaked up by the wall in the bg, leaving the dogs looking a bit flat. Possibly some camera shake or a focus issue, as well. Most of the time, B/W needs to be tack sharp.
If I must see a snapshot of the family pet could it please be in focus. An old teacher once told me to avoid kids and pets because they are very special to you but to your viewers they are just another dog. This is a great photo for your family album. Sorry i am not trying to be the pri... I'm sure you think I am.