I purchased 5 chicks and 4 of them died within 48 hours. The hatchery has given me credit for the ones that died but now I need to get some more chicks so my lone survivor isn't by herself. How far apart between hatches can I have the chicks and still put them together? I have 11 other chickens but they are 16 weeks old that I got all at the same time so I've never come across this. Thanks for any input!