The chicks in the 1st box are LF black, lavender silver, silver and lavender going to CO.
Box #2 has bantam wheatens, silvers and buffs going to TX.
3 has some bantam wheaten Ameraucanas, but the others are my blue egger crosses. They arrived this morning in northern MI, near Cadillac.
4 are bantam Vorwerks and Lakenvelders headed for PA!
My heat pads are stamped "Best by" some date in 2016, so they are a few years old and I bought a large package of them back then. I open and remove each one from its celophane envelope about 30 minutes to an hour before putting it into the transporting box. The two I used yesterday were nice and warm before they and the chicks went into the boxes. I used one last week for an order to MN and it didn't feel like it was warm before sending, so it may have been a dud but the chicks all made it in good condition. I set them in the middle of the box with the red lines, on the pad, faceup. I use them sparingly, knowing it is better for chicks to be too cool in transit then too hot.