Spring’s wound. For scale, the bits of the drain sticking out are 1-1 1/4 inches. Location: top is her back, right is her hind leg.
Entry wound is at the top and you can see how it hooked down, and the fluid-filled pocket it created, hence the drain.
Some bruising, but the wound is draining not troublesome looking fluids, with the NSAIDS she’s not in pain and moving fine. She even lies on her left side where the surgery was.