You're very welcome. I want to add the (actually less than one week old chicks) were Red Bro Broilers. Perhaps birds that are more delicate would not fare as well).
I put mine out at less than a week of age in an enclosed pen with two 2-3 week old Silkies. They were pecking away contentedly all day. At night, they were brought in and given as much crumble as they wanted to ensure that their bellies were full.