They do, yes. There's a substantial body of research showing that soft diets lead to undersize jaws in a number of mammals, humans are just semi-unique in that

They do, yes. There's a substantial body of research showing that soft diets lead to undersize jaws in a number of mammals, humans are just semi-unique in that our airways are very soft and floppy and it doesn't take much for collapse to start happening. If you can't switch your diet to one that involves chewing for the sake of your kid, try and make chewing gum a regular snack.