alt Hacker NewsDepends on diet.
If you keep them on soft food young, the jaw muscles don't get stimulated enough to grow so that the teeth that are coming out sit properly. Misalignment and opportunity for decay ensues.
If you give them decently hard food early on in life you solve most problems.
After that it can still happen but there's less chance.
Also, breastfeeding and not weaning them off on to "baby foods" too soon is better in the same ways you describe.