I like the expression, the sharp focus, blurred background - that all is good. The inquisitive look also makes this a nice picture.
But I did not score it very high because of the black vignette. That creates a gloomy mood that, in my opinion, doesn't jive with the ewe's cheeky looks.
Did you try different processing? High key, with a lighter vignette, for example?
Very cute - I like the grass in the sheep's mouth. Maybe a little too much vignette. Nice b/g color choice to make the sheep pop. No vote, comment only