Making a realistic dog sure is tough, if you're limited to Google images for reference. I'd do better if I owned a dog. My sample is an o.k. character dog, but realism is lacking (a steroid freaky look, Krypto? And the ears are perky, but wrong).
I don't see how pinch is useful; I make a mound that is slightly too large (with muscle or snake or even an elipsoid primitive) and then airbrush or CRTL + build it down to shape (i.e., whittle). I used X, Y and Z axis backdrops, working the curves tool against them for basic shape, then took liberties with them.
Good luck!