My father was a shoe repairman and an orthopedic specialist. Foot care was a big thing in our home growing up. He taught us that children wearing shoes is not a good thing. Children's feet need to feel different types of sensations such as sand, concrete, carpet, floors, etc. to help muscle development and it actually helps toddlers who are learning to walk to keep their heads straight up instead of tilted down. In Eggsley's case, I am sure her head droops down due to its size.
This is just one source that backs up what my late father taught us: https://www.theguardian.com/lifeandstyle/20