I would like to see someone post the details about such an incident. Was the remaining tab cut off flush with the securing mechanism? How soon after application did it happen? Is it possible that it was a growth issue, and not a self tightening issue? How old was the bird? If it self...
While it's been stated that "they can tighten" I have yet to see a credible post from any one who has actually experienced this phenomenon!
The ribs on the micro ties from walmart are tiny, but I've yet to find a tie that has not done the zip as they are intended to do. B/C the ribs are so...
I've used colored zip ties, and my girls still have all of their legs. Zip ties are just like other things: the user must exercise common sense. I do visual inspection when ever I am with my flock. When ever I sell a bird, the zip is removed. No bird leaves my property with a zip tie on her...