Hi Im very interested in this topic as my 2 year old lab appears to be damaging birds. She never makes a mark on a bumper but appears to damage the rib cage of some birds. She is very fast and picks the bird up without slowing down and then appears to take a better grip shortly after. This is where i believe she maybe damaging them as her delivery is very good. I have tried putting wire on them which worked for a short period at slowing her down but she is at it again so I was thinking of using the ecollar just before pickup and when she is re adjusting the bird. Any suggestions please.