Your bird is most likely fine.
It is very common for hens of any breed to take a break from laying. If your hen is just not laying but acting like normal then she is fine and taking a break. Healthy birds have shinny feathers, and bright eyes. They will fight over food and come running to you when they see you holding the food dish. If this is the case the eggs should start coming in again soon.
Hens will also normally slow down or cease egg production when moulting and also during the winter months so don’t be concerned as long as they are acting and appearing as normal. Some diseases cause egg production to cease, so if your hen is decidedly off-colour,a more detailed investigation is necessary.