I sell them at 3 days. If a chick (a very rare occasion) dies it will be within the first 3 days. I have sold 1000's and never once had anybody tell me there chicks or even a chick died. Thats why i have soooo much repeat business. Hatcheries send them to you on day one. So!!Speaking of 1 day chicks, should i nit wait untill chicks are 1 month before selling them? I was think of getting colored zip ties and marking the sold ones to their correct owners then giving them the chicks at 1 month so i know they are more safe when i give them to someone. Also it gives the person time to build the coop. What do you think?