Hit on tummy tuck scar, left very dark bruise on incision 4 and a half weeks post op. Should I be worried?

At 4 and a half weeks post op, my 50 pound English bulldog puppy got excited and jumped up on me. His paw landed right on incision line: this left a horrible dark bruise. Is this something I should be worried about? It doesn't hurt it just looks pretty bad. Can this cause problems with healing?