I don't know if this would have helped in the case of your parents Chow or not but from the second my baby came home, I ensured he was the predictor of All-Wonderful-Things-For-Little-Red-Dogs. Training (both formal and informal - I put the baby in a sling and away we go), games, cuddles, going outside, chance to file their nails on the board, going for walkies, being brushed, yummy treats raining from heaven while they chill on their mats etc happens when the baby is there. No baby, life is boring. The baby at 7.5 months even "helps" with stuff like target wand work by holding a wooden kitchen spoon in the high chair while I click and treat!
My dogs are also pretty used to being stared at and eye contact but we're going to start reinforcing the idea that kids staring is a great thing quite shortly since the baby is now mobile. They're used to being tugged on and bopped as well and think it's a game. I started that because I figured it was possible some idiot might someday try to swat them with a bottle or
rolled up paper or something and didn't want them to be afraid or react badly - I'd rather they think it's an odd human game.
I should also say that my dogs have no fear or aggression problems to start with though and are more or less pretty even going sorts. I'm not clear if perhaps this dog had an aggression issue before you with small children or it was perhaps learned through undersocialization and/or bad