I have a 4 year old male Dane and no kids at this time. I've had my niece and nephew 11/2 and 4 over a couple of times (seperately) and the Dane is ok until the kid starts to walk around on their own. Then the Dane gets a little nervous on what they are going to do next and treats them as some kind of alien and is anxious, so at this time I do not let them interact at all unless I am holding the child in which case the Dane is fine.

We live in the country and don't get too many visitors especially from small children so I understand why he is nervous around them. Any kid shorter than him then he is nervous. Now, I understand the dangers in this so if you do not have any ideas, other then keeping the Dane and child seperated, on how to socialize them then I will keep them at a distance at this time.

Thanks in advance
I understand the dangers in this so if you do not have any ideas, other then keeping the Dane and child seperated, on how to socialize them then I will keep them at a distance at this time.

That may be your best bet. At 4 years old, your Dane may not be able to adjust to children. Heavy socialization needs to be done before the age of 5 months (ideally before the age of 3 months) for the best results.

However, I would suggest that you hire a behaviorist to come to your house and watch the dog with the kids. Your dog's reactions need to be seen in person to be properly evaluated.
One thing you can do - watch the messages you're giving the dog. If you get tense and worried whenever a child is around, he'll pick up on that. Children are "whee, fun!" and he should get special treats when they're around.

But don't let them approach him, at least until you get some in person help.

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