I am new to this forum so hope i am doing this correctly--we had a neighboring farm abandoned and buildings demolished--unfortunately we had gotten some new chicks and we were invaded by timber rats (perhaps from their usual habitat being demolished) and all chicks were killed. we are preparing for another batch and am wondering how old/big chicks have to be before rats will not be attracted to them (or that they can protect themselves)? we did have to resort to poisoning the rats and haven't seen any signs of activity but don't want to take any chances. any knowledge in this area? or experience? thx!