We just have too many variety of predators to protect unless we have lgd's. It doesn't matter if it's covered or not, or totally enclosed. I gave up trying to protect my chickens with "fencing and structures and enclosures" years ago. Mink and snakes get through chicken wire, hawks will find any hole they can, fox can clean you out in one night, and of course the coyotes and panther can't be kept out of anything. And the common problem many around here are having this year, with young live calves and lambs, let alone chickens, is that the turkey vultures are coming in and eating them live.
My brooder is off the ground and made of hardware cloth and is where the dogs can get to it... that way the chicks and the chickens are all protected.
The only modification I've had to make is using a chicken door instead of a human door for the main coop. I have one maremma who loves eggs. She'll protect chicks with her life, but she loves to eat eggs, so I have to make sure she stays out of where the chickens lay. But she has access up to the front where the chicken door is to make sure nothing else gets in there either.
My brooder is off the ground and made of hardware cloth and is where the dogs can get to it... that way the chicks and the chickens are all protected.
The only modification I've had to make is using a chicken door instead of a human door for the main coop. I have one maremma who loves eggs. She'll protect chicks with her life, but she loves to eat eggs, so I have to make sure she stays out of where the chickens lay. But she has access up to the front where the chicken door is to make sure nothing else gets in there either.