I grew up with dogs and some were fully adult before we got them. A wire-haired terrier came into my life when he and I were both nearly five. We never had any disagreements.
However, my father too had grown up with dogs and he had some few sensible rules that had to be obeyed.
We children were not allowed to go near the dogs while they were eating their dinner, nor to approach the dogs if they had a bone to gnaw. If we did so, we were called away and told off.
Until I was seven, I don't remember ever being alone with the dogs -some adult member of the household was always there too.
If your daughter follows similar rules, there shouldn't be any trouble.
I don't like the thought of keeping dogs in crates or cages, even for a short length of time, but perhaps it is no worse than the playpen most of us remember from our early childhood.
If the dog should be so afraid of children that he snaps or growls then your daughter will either need to re-home it, or have it put down.
I was five, when our labrador went mad - not due to rabies, but a brain tumour. The vet was nearly certain that that was what was wrong and Daddy simply asked the vet to take the dog with him and put it down.
We were all fond of the dog, but a dog or a cat is exactly that. Neither should be kept if they are putting children at risk.