I have 30 chicks in the brooder at this time. 10 bantam cochins, 10 bantam brahamas, and 10 bantam New Hampshires. I am building an 8' x 8' coop with run at this time. I have placed the roosts at about 40" above the litter with a droppings board 8" below the roosts. In reading some posts I see that the roost can be too high and cause damage to the birds when they jump off. Any further info on the correct height for these birds would be helpful. Thanks again!