Consult a behaviorist who specializes in resource guarding and uses positive reinforcement techniques. Growling when someone gets close to a certain spot is called resource guarding. It's common, normal dog behavior, but as you have seen, it can get dangerous fast. It is quite treatable, though.
In the meantime, I would keep the dogs separated at all times and do not allow your daughter to be around the dogs unsupervised not even for a second. You should never allow a small child to be alone with a dog, but a dog that's resource guarding is especially worrying.
In the meantime, I would keep the dogs separated at all times and do not allow your daughter to be around the dogs unsupervised not even for a second. You should never allow a small child to be alone with a dog, but a dog that's resource guarding is especially worrying.