|I apologise, I am new to this and you are "stuck" with my comments. Pls. realise that this is *my* learning curve more than yours!
OK, so I have to say I am very critical about "interpretation of theme". I like your photograph for this challenge, but I don't like your title. What exactly are you showing? - "dog + leash", "collar + leash"? Both would work for me, so why use a title that doesn't fit the challenge?
I do like the b&W and I do like the composition and tight crop of your picture, as well as the lighting. I also think the smooth hair of the dog as a background, even though it is perfectly in focus works very well and does not distract from the main subjects. In fact I really like this photograph :-).