DougT,
Can't tell .. there's nothing to remove !

The Predators blow through a Starling, both wings and the body, like it's not even there.
After they exit Starlings up on the feeder, I've heard them smacking branches all the way at the rear of my property.
After hitting one Starling at the edge of my driveway, the Pred ricocheted off the driveway and is buried deep in the wood planks of my barn siding. All the other Preds chewed up ground and disintergrated beyound any of the Starling that were standing at ground level.
And, the exit wound damage is much greater compared to the JSB Jumbos I was using.
Only one fly-off and it dropped like a rock after going about 60 feet. The rest have been instantly DRT !!!!
With the same center mass hits using Jumbo 15.8 gr, the 13.4 gr Jumbo RS, and the Jumbo heavies, all out of my gas Whisper, about 50% fly off, never to be found. Out of about 50-60 I shot with the Whisper and Jumbos this winter, only had a couple that dropped right where they were standing, and quite a few others that flipped around, or ran and needed follow up shots. A couple needed mulitple follow up shots. And a few of what someone rightly called "Zombie birds" they are down, on thier back, not moving, yet minutes later they up and run, or fly off.
So far, with the Trail and Preds I'm 6 for 6. And with all of those, only needed one Pred each and they are done !
Paul.