i like this series, there is a good sense of what you are doing. the execution, lighting and treatment is very well done.
the dog is really out of point though, hurhur.
and yes, for the last blackandwhite, the abrupt cropping of the leg is not good. it looks like a mistake.
you may want to manually blur the backdrop in #1 more, i still can see the wrinkles. or place the chair further away, and shoot with less dof, and turn the wrinkles into bokeh.