The big problem with the zips is that you have to cut them off. Which puts a chick in danger of breaking a leg or cutting them. That is why I suggested the toe punch. That you can do right out of egg and keep track threw growth till you band older. Here is a link to a toe punch chart which I got off here a few months ago.
http://www.dominiquechicken.com/Toe_Punch_Chart.html
I wanted to do that this year but could not get my toe punch till too late.
http://www.dominiquechicken.com/Toe_Punch_Chart.html
I wanted to do that this year but could not get my toe punch till too late.