We got our new chicks 4 days ago and we really love them. Unfortunatly we lost 2 in the first 2 days and are now down to 4. we are going to get another 6 this week ( the minimum we can buy in CT.) My question is can I put the new chicks in the same brooder with the original 4 or should they be seperate? The difference in age should should only be about a week or so.