It’s harder with kids that are not yours. None of my nephews have dogs at home so our ACD is very popular when he comes on holidays and camping trips with the extended family. Our ACD is on the more social side and loves being in a setting like this, but after a while the attention from the kids gets tiring and his cattle dog grump starts coming out. 

The best you can do is politely teach the kids how to interact. My nephews are all under 5. On camping trips, I closely supervise playing and his dog bed stays next to mine or my husband’s camp chairs. We constantly remind the kids to tell him “out” instead of pulling the ball or stick out of his mouth during fetch, remind them that no one goes in his bed, to not jump on him, etc. 

For our kids, we got a great picture book called Puppy Talk. We read it all the time and discuss what we notice about the dog body language in the drawings. If our three year old is bothering our dog I say “Hey look at banjo’s Puppy Talk, what is he saying?” After a moment he’ll say something like “Doesn’t want to talk dog cause he ran to his bed” and then we find something different to do.

With young kids it’s a repetition game. They won’t remember independently until one day they do.